MathsGee Open Question and Answer Bank - Recent questions tagged force
https://mathsgee.com/qna/tag/force
Powered by Question2AnswerA tow truck pulls a car along a gravel road. The force applied by the engine of the tow truck is 9 000 N. The mass of the tow truck is 1 300 kg and the mass of the car is 950 kg.
https://mathsgee.com/qna/8624/a-tow-truck-pulls-a-car-along-a-gravel-road-the-force-applied-by-the-engine-of-the-tow-truck-is-9-000-n-the-mass-of-the-tow-truck-is-1-300-kg-and-the-mass-of-the-car-is-950-kg
A tow truck pulls a car along a gravel road.<br />
The force applied by the engine of the tow truck is 9 000 N. The mass of the tow truck is 1 300 kg and the mass of the car is 950 kg. The vehicles are connected to each other by an inelastic tow bar of negligible mass.<br />
<br />
The tow truck and car move at a CONSTANT VELOCITY.<br />
1 Define the term frictional force.<br />
2 NAME AND STATE the law that explains why the force exerted by the tow truck on the car is the same as the force exerted by the car on the tow truck.<br />
<br />
If the coefficient of kinetic friction between the tow-truck tyres and the road surface is 0,45, calculate the:<br />
3a Magnitude of the tension in the tow bar<br />
b Coefficient of kinetic friction between the CAR tyres and the road surface<br />
Suddenly the tow bar between the car and the tow truck disconnects and the car comes loose.<br />
4 Using a relevant law of motion, explain why the car continues moving forward for a short distance.<br />
<br />
5 Calculate the acceleration of the car as it comes to a stop after a short distance.Grade 11 Physical Scienceshttps://mathsgee.com/qna/8624/a-tow-truck-pulls-a-car-along-a-gravel-road-the-force-applied-by-the-engine-of-the-tow-truck-is-9-000-n-the-mass-of-the-tow-truck-is-1-300-kg-and-the-mass-of-the-car-is-950-kgSun, 26 Apr 2020 19:22:40 +0000What is the relationship between net force and acceleration?
https://mathsgee.com/qna/8623/what-is-the-relationship-between-net-force-and-acceleration
What is the relationship between net force and acceleration?Grade 11 Physical Scienceshttps://mathsgee.com/qna/8623/what-is-the-relationship-between-net-force-and-accelerationSun, 26 Apr 2020 19:16:31 +0000Define the term resultant vector.
https://mathsgee.com/qna/8622/define-the-term-resultant-vector
Define the term resultant vector.Grade 11 Physical Scienceshttps://mathsgee.com/qna/8622/define-the-term-resultant-vectorSun, 26 Apr 2020 19:13:05 +0000A block with a mass of 4 kg is pulled upwards along a frictionless slope, inclined at an angle θ, with a force F.
https://mathsgee.com/qna/8618/a-block-with-a-mass-of-4-kg-is-pulled-upwards-along-a-frictionless-slope-inclined-at-an-angle-with-a-force-f
A block with a mass of 4 kg is pulled upwards along a frictionless slope, inclined at an angle θ, with a force F.<br />
Which ONE of the following equations can be used to calculate the magnitude of the normal force (N)?<br />
A N = (4)(9,8)sinθ<br />
B N = F - (4)(9,8)cosθ<br />
C N = F + (4)(9,8)cosθ<br />
D N = (4)(9,8)cosθGrade 11 Physical Scienceshttps://mathsgee.com/qna/8618/a-block-with-a-mass-of-4-kg-is-pulled-upwards-along-a-frictionless-slope-inclined-at-an-angle-with-a-force-fSun, 26 Apr 2020 19:00:03 +0000What is the difference between a conservative and non-conservative force?
https://mathsgee.com/qna/7468/what-is-the-difference-between-a-conservative-and-non-conservative-force
What is the difference between a conservative and non-conservative force?Grade 12 Physical Scienceshttps://mathsgee.com/qna/7468/what-is-the-difference-between-a-conservative-and-non-conservative-forceMon, 20 Apr 2020 13:16:46 +0000Define the work done on an object by a constant force F
https://mathsgee.com/qna/7466/define-the-work-done-on-an-object-by-a-constant-force-f
Define the work done on an object by a constant force FGrade 12 Physical Scienceshttps://mathsgee.com/qna/7466/define-the-work-done-on-an-object-by-a-constant-force-fMon, 20 Apr 2020 13:15:18 +0000Using Newton's 2nd law, define a resultant force.
https://mathsgee.com/qna/7458/using-newtons-2nd-law-define-a-resultant-force
Using Newton's 2nd law, define a resultant force.Grade 12 Physical Scienceshttps://mathsgee.com/qna/7458/using-newtons-2nd-law-define-a-resultant-forceMon, 20 Apr 2020 13:11:51 +0000Define frictional force, f.
https://mathsgee.com/qna/7443/define-frictional-force-f
Define frictional force, f.Grade 12 Physical Scienceshttps://mathsgee.com/qna/7443/define-frictional-force-fMon, 20 Apr 2020 13:04:25 +0000Define normal force, N.
https://mathsgee.com/qna/7442/define-normal-force-n
Define normal force, N.Grade 12 Physical Scienceshttps://mathsgee.com/qna/7442/define-normal-force-nMon, 20 Apr 2020 13:04:06 +0000When the distance between the centres of the two bodies is doubled, the magnitude of the gravitational force, in terms of F, will now be …
https://mathsgee.com/qna/4788/when-the-distance-between-the-centres-of-the-two-bodies-is-doubled-the-magnitude-of-the-gravitational-force-in-terms-of-f-will-now-be
<p style="margin-left:1.95pt">The magnitude of the gravitational force exerted by one body on another body is <strong><em>F</em></strong>. When the distance between the centres of the two bodies is doubled, the magnitude of the gravitational force, in terms of <strong><em>F</em></strong>, will now be …</p>Grade 12 Physical Scienceshttps://mathsgee.com/qna/4788/when-the-distance-between-the-centres-of-the-two-bodies-is-doubled-the-magnitude-of-the-gravitational-force-in-terms-of-f-will-now-beMon, 14 Oct 2019 10:57:12 +0000In order to hit the intended target, how fast must he throw the balloon backwards?
https://mathsgee.com/qna/4767/in-order-to-hit-the-intended-target-how-fast-must-he-throw-the-balloon-backwards
A rider in a balloon throws a water balloon from the balloon basket backwards to hit a target directly under him at the time of release. The splat is seen 3.5 seconds later when the balloon is 50m away from the target. In order to hit the intended target, how fast must he throw the balloon backwards?Grade 12 Physical Scienceshttps://mathsgee.com/qna/4767/in-order-to-hit-the-intended-target-how-fast-must-he-throw-the-balloon-backwardsMon, 14 Oct 2019 07:10:32 +0000Calculate the gravitational force between the moon and earth if the distance between the centers of the two are doubled
https://mathsgee.com/qna/3312/calculate-the-gravitational-force-between-the-moon-and-earth-if-the-distance-between-the-centers-of-the-two-are-doubled
Calculate the gravitational force between the moon and earth if the distance between the centers of the two are doubledGrade 12 Physical Scienceshttps://mathsgee.com/qna/3312/calculate-the-gravitational-force-between-the-moon-and-earth-if-the-distance-between-the-centers-of-the-two-are-doubledTue, 03 Sep 2019 08:10:20 +0000Calculate the gravitational force between the moon and earth if both the mass of the earth and that of the moon are doubled
https://mathsgee.com/qna/3311/calculate-the-gravitational-force-between-the-moon-and-earth-if-both-the-mass-of-the-earth-and-that-of-the-moon-are-doubled
Calculate the gravitational force between the moon and earth if both the mass of the earth and that of the moon are doubledGrade 12 Physical Scienceshttps://mathsgee.com/qna/3311/calculate-the-gravitational-force-between-the-moon-and-earth-if-both-the-mass-of-the-earth-and-that-of-the-moon-are-doubledTue, 03 Sep 2019 08:09:33 +0000Calculate the gravitational force between the moon and earth if the earth's mass were doubled
https://mathsgee.com/qna/3310/calculate-the-gravitational-force-between-the-moon-and-earth-if-the-earths-mass-were-doubled
Calculate the gravitational force between the moon and earth if the earth's mass were doubledGrade 12 Physical Scienceshttps://mathsgee.com/qna/3310/calculate-the-gravitational-force-between-the-moon-and-earth-if-the-earths-mass-were-doubledTue, 03 Sep 2019 08:08:31 +0000Calculate the gravitational force between the moon and earth if the moon's mass were doubled
https://mathsgee.com/qna/3309/calculate-the-gravitational-force-between-the-moon-and-earth-if-the-moons-mass-were-doubled
Calculate the gravitational force between the moon and earth if the moon's mass were doubledGrade 12 Physical Scienceshttps://mathsgee.com/qna/3309/calculate-the-gravitational-force-between-the-moon-and-earth-if-the-moons-mass-were-doubledTue, 03 Sep 2019 08:07:50 +0000Calculate the gravitational force between the moon and earth?
https://mathsgee.com/qna/3298/calculate-the-gravitational-force-between-the-moon-and-earth
Calculate the gravitational force between the moon and earth?Grade 12 Physical Scienceshttps://mathsgee.com/qna/3298/calculate-the-gravitational-force-between-the-moon-and-earthTue, 03 Sep 2019 07:37:06 +0000What does the gravitational force equation explain?
https://mathsgee.com/qna/3295/what-does-the-gravitational-force-equation-explain
What does the gravitational force equation explain?Grade 12 Physical Scienceshttps://mathsgee.com/qna/3295/what-does-the-gravitational-force-equation-explainTue, 03 Sep 2019 07:30:30 +0000What is the acceleration if a ${2400}{kg}$ truck experiences an unbalanced force of ${1800}{N}$?
https://mathsgee.com/qna/2672/what-is-the-acceleration-if-a-2400-kg-truck-experiences-an-unbalanced-force-of-1800-n
What is the acceleration if a ${2400}{kg}$ truck experiences an unbalanced force of ${1800}{N}$?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2672/what-is-the-acceleration-if-a-2400-kg-truck-experiences-an-unbalanced-force-of-1800-nWed, 28 Aug 2019 13:21:41 +0000How much work does a horse pulling a cart with a force of ${4100}{N}$ for a distance of ${15}{m}$ do?
https://mathsgee.com/qna/2638/how-much-work-does-a-horse-pulling-a-cart-with-a-force-of-4100-n-for-a-distance-of-15-m-do
How much work does a horse pulling a cart with a force of ${4100}{N}$ for a distance of ${15}{m}$ do?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2638/how-much-work-does-a-horse-pulling-a-cart-with-a-force-of-4100-n-for-a-distance-of-15-m-doWed, 28 Aug 2019 08:56:04 +0000A man pushed a car ${8}{m}$, doing ${1800}{J}$ of work in the process. What force did he push the car with?
https://mathsgee.com/qna/2606/a-man-pushed-a-car-8-m-doing-1800-j-of-work-in-the-process-what-force-did-he-push-the-car-with
A man pushed a car ${8}{m}$, doing ${1800}{J}$ of work in the process. What force did he push the car with?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2606/a-man-pushed-a-car-8-m-doing-1800-j-of-work-in-the-process-what-force-did-he-push-the-car-withWed, 28 Aug 2019 06:36:38 +0000A Nissan LEAF has mass ${1557}{kg}$. If it accelerates at ${2.3}{m/s^{2}}$, what is the unbalanced force on it?
https://mathsgee.com/qna/2602/a-nissan-leaf-has-mass-1557-kg-if-it-accelerates-at-2-3-m-s-2-what-is-the-unbalanced-force-on-it
A Nissan LEAF has mass ${1557}{kg}$. If it accelerates at ${2.3}{m/s^{2}}$, what is the unbalanced force on it?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2602/a-nissan-leaf-has-mass-1557-kg-if-it-accelerates-at-2-3-m-s-2-what-is-the-unbalanced-force-on-itWed, 28 Aug 2019 06:29:08 +0000If an object of mass ${5}{kg}$ experiences a force of ${3}{N}$, what is its acceleration?
https://mathsgee.com/qna/2585/if-an-object-of-mass-5-kg-experiences-a-force-of-3-n-what-is-its-acceleration
If an object of mass ${5}{kg}$ experiences a force of ${3}{N}$, what is its acceleration?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2585/if-an-object-of-mass-5-kg-experiences-a-force-of-3-n-what-is-its-accelerationWed, 28 Aug 2019 05:59:48 +0000As the normal force decreases, the force of friction (increases/decreases)?
https://mathsgee.com/qna/2567/as-the-normal-force-decreases-the-force-of-friction-increases-decreases
As the normal force decreases, the force of friction (increases/decreases)?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2567/as-the-normal-force-decreases-the-force-of-friction-increases-decreasesTue, 27 Aug 2019 02:01:44 +0000As the coefficient of friction increases, the force of friction (increases/decreases)?
https://mathsgee.com/qna/2566/as-the-coefficient-of-friction-increases-the-force-of-friction-increases-decreases
As the coefficient of friction increases, the force of friction (increases/decreases)?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2566/as-the-coefficient-of-friction-increases-the-force-of-friction-increases-decreasesTue, 27 Aug 2019 02:00:57 +0000What will have a higher coefficient of friction. A dry road or a wet road? (Which will have the rougher surface?)
https://mathsgee.com/qna/2565/what-will-have-a-higher-coefficient-of-friction-a-dry-road-or-a-wet-road-which-will-have-the-rougher-surface
What will have a higher coefficient of friction. A dry road or a wet road? (Which will have the rougher surface?)Grade 12 Physical Scienceshttps://mathsgee.com/qna/2565/what-will-have-a-higher-coefficient-of-friction-a-dry-road-or-a-wet-road-which-will-have-the-rougher-surfaceTue, 27 Aug 2019 02:00:18 +0000What is the relationship between inertia and friction?
https://mathsgee.com/qna/2564/what-is-the-relationship-between-inertia-and-friction
What is the relationship between inertia and friction?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2564/what-is-the-relationship-between-inertia-and-frictionTue, 27 Aug 2019 01:59:33 +0000A girl weighing 600 Newtons pushes a car with a weight of 5,000 Newtons with a force of 100 Newtons. How much force does the car exert on the girl?
https://mathsgee.com/qna/2563/a-girl-weighing-600-newtons-pushes-a-car-with-a-weight-of-5-000-newtons-with-a-force-of-100-newtons-how-much-force-does-the-car-exert-on-the-girl
A girl weighing 600 Newtons pushes a car with a weight of 5,000 Newtons with a force of 100 Newtons. How much force does the car exert on the girl?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2563/a-girl-weighing-600-newtons-pushes-a-car-with-a-weight-of-5-000-newtons-with-a-force-of-100-newtons-how-much-force-does-the-car-exert-on-the-girlTue, 27 Aug 2019 01:58:05 +0000A bat exerts a 50-Newton force on a baseball. How much force does the ball exert on the bat?
https://mathsgee.com/qna/2562/a-bat-exerts-a-50-newton-force-on-a-baseball-how-much-force-does-the-ball-exert-on-the-bat
A bat exerts a 50-Newton force on a baseball. How much force does the ball exert on the bat?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2562/a-bat-exerts-a-50-newton-force-on-a-baseball-how-much-force-does-the-ball-exert-on-the-batTue, 27 Aug 2019 01:57:17 +0000A force of 10 N is applied to an object which accelerates it at 2 m/s2 to the right. If there is 4 N of friction to the left, determine the mass of the object. Include a free-body diagram.
https://mathsgee.com/qna/2561/a-force-of-10-n-is-applied-to-an-object-which-accelerates-it-at-2-m-s2-to-the-right-if-there-is-4-n-of-friction-to-the-left-determine-the-mass-of-the-object-include-a-free-body-diagram
<p>A force of 10 N is applied to an object which accelerates it at 2 m/s2 to the right. If there is 4 N of friction to the left, determine the mass of the object. </p>
<p><strong>Include a free-body diagram.</strong></p>Grade 12 Physical Scienceshttps://mathsgee.com/qna/2561/a-force-of-10-n-is-applied-to-an-object-which-accelerates-it-at-2-m-s2-to-the-right-if-there-is-4-n-of-friction-to-the-left-determine-the-mass-of-the-object-include-a-free-body-diagramTue, 27 Aug 2019 01:55:47 +0000Celeste pushes a 5.0 kg Thanksgiving Food Drive box across the stage. If the box moves across the stage with an acceleration of 3 m/s2, determine the net force applied by Celeste.
https://mathsgee.com/qna/2560/celeste-pushes-a-5-0-kg-thanksgiving-food-drive-box-across-the-stage-if-the-box-moves-across-the-stage-with-an-acceleration-of-3-m-s2-determine-the-net-force-applied-by-celeste
Celeste pushes a 5.0 kg Thanksgiving Food Drive box across the stage. If the box moves across the stage with an acceleration of 3 m/s2, determine the net force applied by Celeste.Grade 12 Physical Scienceshttps://mathsgee.com/qna/2560/celeste-pushes-a-5-0-kg-thanksgiving-food-drive-box-across-the-stage-if-the-box-moves-across-the-stage-with-an-acceleration-of-3-m-s2-determine-the-net-force-applied-by-celesteTue, 27 Aug 2019 01:54:53 +0000Alexa pushes on an object with 10 Newtons of force to the right. Julie pushes the same object with 6 Newtons to the left. What is the net force acting on the object? (This is why we did vectors!!!)
https://mathsgee.com/qna/2556/alexa-pushes-on-an-object-with-10-newtons-of-force-to-the-right-julie-pushes-the-same-object-with-6-newtons-to-the-left-what-is-the-net-force-acting-on-the-object-this-is-why-we-did-vectors
<p>Alexa pushes on an object with 10 Newtons of force to the right. Julie pushes the same object with 6 Newtons to the left. <strong>What is the net force acting on the object? </strong>(This is why we did vectors!!!)</p>Grade 12 Physical Scienceshttps://mathsgee.com/qna/2556/alexa-pushes-on-an-object-with-10-newtons-of-force-to-the-right-julie-pushes-the-same-object-with-6-newtons-to-the-left-what-is-the-net-force-acting-on-the-object-this-is-why-we-did-vectorsTue, 27 Aug 2019 01:50:27 +0000Dan wants to hit a bird with a water balloon. The bird is flying above Dan at a height of 40 meters. What’s the minimum velocity Dan should throw the water balloon in order to hit the bird?
https://mathsgee.com/qna/2519/dan-wants-to-hit-a-bird-with-a-water-balloon-the-bird-is-flying-above-dan-at-a-height-of-40-meters-whats-the-minimum-velocity-dan-should-throw-the-water-balloon-in-order-to-hit-the-bird
Dan wants to hit a bird with a water balloon. The bird is flying above Dan at a height of 40 meters. What’s the minimum velocity Dan should throw the water balloon in order to hit the bird?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2519/dan-wants-to-hit-a-bird-with-a-water-balloon-the-bird-is-flying-above-dan-at-a-height-of-40-meters-whats-the-minimum-velocity-dan-should-throw-the-water-balloon-in-order-to-hit-the-birdTue, 27 Aug 2019 01:16:13 +0000If the distance travelled by the balloon is 10 meters and it hit the victim at a final velocity of 20 m/s, how fast did Chris throw the water balloon?
https://mathsgee.com/qna/2514/if-the-distance-travelled-by-the-balloon-is-10-meters-and-it-hit-the-victim-at-a-final-velocity-of-20-m-s-how-fast-did-chris-throw-the-water-balloon
Chris throws a water balloon off the top of the school building at an unsuspecting victim. If the distance travelled by the balloon is 10 meters and it hit the victim at a final velocity of 20 m/s, how fast did Chris throw the water balloon?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2514/if-the-distance-travelled-by-the-balloon-is-10-meters-and-it-hit-the-victim-at-a-final-velocity-of-20-m-s-how-fast-did-chris-throw-the-water-balloonTue, 27 Aug 2019 01:11:13 +0000A 20,000 kg train makes a turn of 50 meters at a velocity of 40 m/s. Determine the centripetal force of the train.
https://mathsgee.com/qna/2509/a-20-000-kg-train-makes-a-turn-of-50-meters-at-a-velocity-of-40-m-s-determine-the-centripetal-force-of-the-train
A 20,000 kg train makes a turn of 50 meters at a velocity of 40 m/s. Determine the centripetal force of the train.Grade 12 Physical Scienceshttps://mathsgee.com/qna/2509/a-20-000-kg-train-makes-a-turn-of-50-meters-at-a-velocity-of-40-m-s-determine-the-centripetal-force-of-the-trainTue, 27 Aug 2019 01:06:49 +0000A 4,000-kg car makes a turn with a velocity of 20 m/s. If the centripetal force of the car is 600 Newtons, determine the radius of the turn.
https://mathsgee.com/qna/2508/a-4-000-kg-car-makes-a-turn-with-a-velocity-of-20-m-s-if-the-centripetal-force-of-the-car-is-600-newtons-determine-the-radius-of-the-turn
A 4,000-kg car makes a turn with a velocity of 20 m/s. If the centripetal force of the car is 600 Newtons, determine the radius of the turn.Grade 12 Physical Scienceshttps://mathsgee.com/qna/2508/a-4-000-kg-car-makes-a-turn-with-a-velocity-of-20-m-s-if-the-centripetal-force-of-the-car-is-600-newtons-determine-the-radius-of-the-turnTue, 27 Aug 2019 01:06:24 +0000A 4-kg ball is swung around on a string with a length of 4 meters. If the centripetal force is 30 Newtons, determine the velocity of the ball.
https://mathsgee.com/qna/2507/a-4-kg-ball-is-swung-around-on-a-string-with-a-length-of-4-meters-if-the-centripetal-force-is-30-newtons-determine-the-velocity-of-the-ball
A 4-kg ball is swung around on a string with a length of 4 meters. If the centripetal force is 30 Newtons, determine the velocity of the ball.Grade 12 Physical Scienceshttps://mathsgee.com/qna/2507/a-4-kg-ball-is-swung-around-on-a-string-with-a-length-of-4-meters-if-the-centripetal-force-is-30-newtons-determine-the-velocity-of-the-ballTue, 27 Aug 2019 01:05:40 +0000Chang, with a mass of 70-kg, hops on to the gravitron which has a radius of 10 meters and a velocity of 10 m/s. Determine the centripetal force acting on Chang.
https://mathsgee.com/qna/2506/chang-with-a-mass-of-70-kg-hops-on-to-the-gravitron-which-has-a-radius-of-10-meters-and-a-velocity-of-10-m-s-determine-the-centripetal-force-acting-on-chang
Chang, with a mass of 70-kg, hops on to the gravitron which has a radius of 10 meters and a velocity of 10 m/s. Determine the centripetal force acting on Chang.Grade 12 Physical Scienceshttps://mathsgee.com/qna/2506/chang-with-a-mass-of-70-kg-hops-on-to-the-gravitron-which-has-a-radius-of-10-meters-and-a-velocity-of-10-m-s-determine-the-centripetal-force-acting-on-changTue, 27 Aug 2019 01:05:08 +0000What is the centripetal force of a 7.0 kg object with a centripetal acceleration of 5 m/s2?
https://mathsgee.com/qna/2505/what-is-the-centripetal-force-of-a-7-0-kg-object-with-a-centripetal-acceleration-of-5-m-s2
What is the centripetal force of a 7.0 kg object with a centripetal acceleration of 5 m/s2?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2505/what-is-the-centripetal-force-of-a-7-0-kg-object-with-a-centripetal-acceleration-of-5-m-s2Tue, 27 Aug 2019 01:04:35 +0000WHat is centripetal force?
https://mathsgee.com/qna/2504/what-is-centripetal-force
WHat is centripetal force?Grade 12 Physical Scienceshttps://mathsgee.com/qna/2504/what-is-centripetal-forceTue, 27 Aug 2019 01:04:01 +0000Explain how force, mass and acceleration are related
https://mathsgee.com/qna/2160/explain-how-force-mass-and-acceleration-are-related
Explain how force, mass and acceleration are relatedGrade 12 Physical Scienceshttps://mathsgee.com/qna/2160/explain-how-force-mass-and-acceleration-are-relatedWed, 21 Aug 2019 12:28:21 +0000