Newton's Laws Practice Problems

Given the race car shown in the image - assume the car is moving forward, is the car speeding up or slowing down?

• speeding up

• slowing down

What is the net force on this object?

• 40 N left

• 40 N right

• 80 N right

• 80 N left

What is the net force on this object?

• 25 N up

• 25 N down

• 50 N up

• 75 N down

If the bear has a weight of 1500 N, what is the reading on the fourth scale?

• 550 N

• 1500 N

• 400 N

• 250 N

What is the net force required to give an automobile of mass 1600 kg an acceleration of 4.5 m/s²?

• 7200 N

• 7200 m/s

• 355.5 N

• 355.5 kg

What is the acceleration of a wagon of mass 20 kg if a horizontal force of 64 N is applied to it (ignore friction)?

• 3.2 m/s²

• 3.2 m/s

• 1280 N

• 1280 m/s²

What is the mass of an object that is experiencing a net force of 200 N and an acceleration of 500 m/s²?

• 0.4 kg

• 0.4 m/s

• 2.5 kg

• 2.5 N

A bicycle takes 8.0 seconds to accelerate at a constant rate from rest to a speed of 4.0 m/s. If the mass of the bicycle and rider together is 85 kg, what is the net force acting on the bicycle?

• 42.5 N

• 0.5 m/s²

• 340 N

• 21.3 m/s

Jane has a mass of 40 kg. She pushes on a 50 kg rock with a force of 100 N. What force does the rock exert on Jane?

• 100 N

• 40 N

• 50 N

• 100 kg

An 8 kg bowling ball is rolling in a straight line towards you. If its momentum is 16 kg*m/s, how fast is it traveling?

• 2 m/s

• 0.5 N

• 2 m/s/s

• 128 m/s