# Glencoe Physical Science

## Chapter 3: Forces

### Self-Check Quiz.-Eng.

 1 Newton's third law of motion states that __________. Need a Hint? A) for every action force there is an equal and opposite reaction force B) an object in motion tends to stay in motion C) an object at rest tends to stay at rest D) force is equal to mass times acceleration 2 What causes a rocket to move? Need a Hint? A) The rockets engines push against the vacuum of space. B) The rocket pushes away from gravity. C) The rocket's engines push exhaust gas away from it. D) The rocket follows Newton's first law of motion. 3 Which planet was discovered because of its gravitational pull on other planets? Need a Hint? A) Mars B) Uranus C) Venus D) Jupiter 4 What is the equation for momentum? Need a Hint? A) P = m/v B) F = m x a C) F = m/a D) P = m x v 5 What can change when momentum changes? Need a Hint? A) mass B) mass and velocity C) velocity D) neither mass nor velocity 6 What happens to the momentum of a baseball bat when it hits a baseball? Need a Hint? A) All of it is transferred to the baseball. B) All of it remains in the bat. C) It decreases to zero. D) Some of it is transferred to the baseball.