Change in an object's motion is _____ to the force impressed or applied.

	linear
	angular
	proportional
	inverse

2.

Choose the best answer. Who wrote Principia?

	Johannes Kepler
	Galileo
	Eugene Cernan
	Isaac Newton

3.

Choose the best answer. The formula for calculating amount of force is _____.

4.

Choose the best answer. If a(n) _____ is applied to an object, the object will exert an equal and opposite force back.

	motion
	acceleration
	standard
	force

5.

Choose the best answer. Galileo experimented with all of the following, EXCEPT _____.

	pendulums
	spring wrenches
	free-falling objects
	light and mirrors

6.

Choose the best answer. All forces occur in pairs that are _____ to each other.

	equal and opposite
	static and dynamic
	proportional and accelerated
	accelerated and impressed

7.

Choose the best answer. _____ is the science branch that explores all phenomena of light energy.

	Acoustics
	Astrology
	Luminology
	Optics

8.

Check all that apply. Which experimental results are valuable?

	positive results
	negative results
	neither of these

9.

Choose the best answer. An object moving in a frictionless environment remains in motion unless _____.

	accelerated
	acted upon by an outside force
	acted upon by inertia
	all of these

10.

Choose the best answer. The revolution rate of a(n) _____ such as Mercury, varies with its distance from the Sun.

	asteroid
	star
	moon
	planet

11.

Choose the best answer. Since Kepler's time, we have known the only force acting on a planet must be directed toward _____.

	the other planets
	the galaxy
	the Moon
	the Sun

12.

Drag and drop the words with the descriptions.

to apply pressure to; to influence

the resistance to change in motion

measure of an object's state of motion

the distance and direction traveled by a moving object in a certain period of time

the amount of matter in any object

expresses a greater or lesser amount

the rate at which change in velocity occurs

measures the momentum of an object circling about some other object

Choices

velocity

magnitude

mass

acceleration

inertia

momentum

angular momentum

impress

13.

Choose the best answer. _____ is the force that causes rotation.

	Gravity
	Friction
	Elasticity
	Torque