# Glencoe Science Level Green

## Chapter 23: Newton’s Laws of Motion

### Section 2 Self-Check Quiz-Eng.

 1 A __________ is a push or a pull. Need a Hint? A) force B) motion C) velocity D) acceleration 2 A ball is thrown straight up in the air. According to Newton's first law of motion, what is the reason for the ball falling back to Earth? Need a Hint? A) It is accelerating in the same direction as Earth's gravitational force on it. B) The change in the ball's acceleration is proportional to the force acting on it. C) The ball exerts a force on the air surrounding it. D) A force has acted on it. 3 The SI unit for force is the __________. Need a Hint? A) pound B) kilogram C) newton D) mass number 4 Newton's first law of motion states that __________. Need a Hint? A) an object will remain at rest or keep moving at constant speed unless a force acts on it B) acceleration is calculated by dividing the force exerted on an object by the mass of the object C) when a force acts on an object, its acceleration is in the same direction as the force D) when a force is applied on an object, there is an equal force applied by the object in the opposite direction 5 __________ measures an object's tendency to resist changing its motion. Need a Hint? A) Gravity B) Acceleration C) Inertia D) Mass 6 Forces that cancel each other are called __________ forces. Need a Hint? A) neutral B) inactivated C) balanced D) null