Practice Newton's Third Law in Physics
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
For every action force, there is an equal in magnitude and opposite in direction reaction force.
When you push something, it pushes back on you just as hard.
Example 1
easyA person pushes against a wall with a force of 50 \text{ N}. What force does the wall exert on the person?
Example 2
mediumA 70 \text{ kg} skater pushes a 50 \text{ kg} skater with a force of 100 \text{ N}. What is the acceleration of each skater?
Example 3
easyA hammer strikes a nail with 200 \text{ N} of force. What force does the nail exert on the hammer?
Example 4
easyA rocket pushes exhaust gases backward with a force of 4.0 \times 10^4 \text{ N}. What force do the gases exert on the rocket?