Newton’s 2nd Law Problems F=MA
Using the 4-step process (formula, plug in values, answer & correct units) complete the problems below.
1. How much force is required to accelerate a 50 kg mass at 4 m/s2?
2. Given the force of 100 N and an acceleration of 5 m/s2, what is the mass?
3. What is the acceleration of a 7 kg mass being pulled by 56 N force?
4. What is the mass of a block accelerating to 2 m/s2 and pushed by 9 N of force?
5. Given a force of 75 N and an acceleration of 3 m/s2 what is the mass?
6. What force is necessary to accelerate a 5 kg mass at 12 m/s2?
7. What is the acceleration of a 24 kg mass pushed by an 8 N force?
8. An automobile with a mass of 1000 kg accelerates when the traffic light turns green. If the net
force on the car is 4000 N, what is the cars acceleration?
9. How much force is required to accelerate a 50 kg mass at 2 m/s2?
10. A 100 kg crate, sliding on the floor is brought to a stop by a 25 N force. What is the acceleration
of the crate?
11. What is the acceleration of a 7kg mass pushed by a 3.5 N force?
12. What is the acceleration caused by a net force of 2 N on a 2 kg mass?
13. How much force is required to accelerate an 1800 kg truck at 3 m/s2?
14. What is the mass of an object that requires a force of 15 N to accelerate it at 1.3 m/s 2?
15. What is the acceleration of 2200 kg truck if a force of 4000 N is used to stop it?
16. What is the acceleration of a 1.5 kg ball if a force of 9 N is applied to it?
17. How much force is needed to move a 26 kg cart so it accelerates at 1.5 m/s2?
18. A little boy pushed a wagon with his dog in it. The mass of the dog and wagon together is 45 kg.
The wagon accelerates at 0.85 m/s2. What force is the boy pulling with?
19. A 1650 kg car accelerates at a rate of 4.0 m/s2. How much force is the car’s engine producing?
20. A 68 kg runner exerts a force of 59 N. What is the acceleration of the runner?
21. A shot-putter exerts an unbalanced force of 140 N on a shot giving it an acceleration of 19.0
m/s2. What is the mass of the shot?
22. A racecar undergoes a uniform acceleration of 8.0 m/s2. If the unbalanced force causing the
acceleration is 6000 N, what is the mass of the racecar?
23. A crate is dragged across an ice-covered lake. The box accelerates at 0.08 m/s2 and is pulled by a
47 N force. What is the mass of the box?
24. Three women push a stalled car. Each woman pushed with a 425 N force. What is the mass of the
car if the car accelerates at 0.85 m/s2?
25. A tennis ball, 0.341 kg, is accelerated at a rate of 164 m/s2 when hit by a professional tennis
player. What force does the player’s tennis racket exert on the ball?
26. A 7 kg block rests on a surface with 6 N of friction and is being pushed by a 23 N force. What is its
acceleration?
27. When an F-14 airplane takes off an aircraft carrier it is literally catapulted off the flight deck. The
plane’s final speed at take off is 68.2 m/s. The F-14 starts from rest. The plane accelerates in 2
seconds and has a mass of 29,545 kg. What is the total force that gets the F-14 in the air?
28. A sports car accelerates from 0 to 27 m/s in 6.3 seconds. The car exerts a force of 4106 N. What
is the mass of the car?
29. A little car has a maximum acceleration of 25.7 m/s2. What is the new maximum acceleration of
the little car if it tows another car that has the same mass?
30. A boy can accelerate at 1.00 m/s2 over a short distance. If the boy were to take an energy pill and
suddenly have the ability to accelerate at 5.6 m/s2, then how would his new energy pill force
compare to his earlier force? If the boy’s earlier force was 45 N, what is the size of his energy pill
force?
PhyzJob:
A Day at the Races
a= F
m
1. Cart A has a mass of 1 kg and is being pulled with a
force of 1 N. Cart B has a mass of 1 kg and is being
pulled with a force of 2 N. Which undergoes the
greater acceleration?
2. Cart A has a mass of 1 kg and is being pulled with a
force of 1 N. Cart B has a mass of 2 kg and is being
pulled with a force of 1 N. Which undergoes the
greater acceleration?
A
A
B
Same for both
B
A
A
B
B
Same for both
3. Cart A has a mass of 1 kg and is being pulled with a
force of 1 N. Cart B has a mass of 2 kg and is being
pulled with a force of 2 N. Which undergoes the
greater acceleration?
4. Cart A has a mass of 1 kg and is being pulled with a
force of 1 N. Cart B has a mass of 3 kg and is being
pulled with a force of 4 N. Which undergoes the
greater acceleration?
A
A
B
Same for both
B
A
A
B
B
Same for both
5. Cart A has a mass of 1 kg and is being pulled with a
force of 4 N. Cart B has a mass of 4 kg and is being
pulled with a force of 4 N. Which undergoes the
greater acceleration?
6. Cart A has a mass of 1 kg and is being pulled with a
force of 2 N. Cart B has a mass of 4 kg and is being
pulled with a force of 3 N. Which undergoes the
greater acceleration?
A
A
B
Same for both
B
A
A
B
B
The Book of Phyz © Dean Baird. All rights reserved.
Same for both
10/4/12
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