Practice Newton's Second Law in Physics

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

The acceleration of an object is equal to the net force applied divided by its mass, in the direction of the force.

Push harder and you get faster acceleration; heavier object means slower acceleration for the same push.

Example 1

easy
A 10 \text{ kg} cart is pushed with a net force of 50 \text{ N}. What is the acceleration of the cart?

Example 2

medium
A 1200 \text{ kg} car accelerates from rest to 20 \text{ m/s} in 8 \text{ seconds}. What net force is required?

Example 3

hard
A 5 \text{ kg} block on a frictionless surface is pulled by a 30 \text{ N} force at an angle of 30° above the horizontal. What is the horizontal acceleration?

Example 4

medium
A 1500 \text{ kg} truck accelerates at 1.2 \text{ m/s}^2 while resistive forces total 300 \text{ N} opposite the motion. What forward force must the engine provide?
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