1.

Match the forces with the correct placement on the force diagram.

C

D

B

A

2.

Select the best answer. Which of these carts has the greatest inertia?

3.

Select the best answer. _____ is the tendency of an object to resist any change in motion.

	Friction
	Gravity
	Momentum
	Inertia

4.

Select the best answer. Which of these has the greater gravitational pull?

	A
	B

5.

Select the best answer. _____is the force that opposes motion between two surfaces that touch each other.

	Gravity
	Acceleration
	Inertia
	Friction

6.

Select the best answer. Which type of friction makes it hard to get an object to start moving?

	rolling
	static
	sliding

7.

Select the best answer. Which of these has the greater gravitational pull?

	B
	A

8.

Select the best answer. Which of these forces is the strongest?

	strong nuclear
	electromagnetic
	gravitational
	weak nuclear

9.

Select the best answer. Which quantities are vectors?

	velocity
	acceleration
	speed
	both velocity and acceleration

10.

Select the best answer.

An object at rest tends to stay at rest and an object in motion tends to stay in motion, according to _____.

	Newton's third law of motion
	Newton's first law of motion
	Newton's second law of motion

11.

Select the best answer. Which of these soccer balls will move?

	object A because of balanced forces
	object B because of unbalanced forces
	object B because of balanced forces
	object A because of unbalanced forces

12.

Select the best answer.

When Sasha starts to ride a bike, it is very difficult for her to get going. When itcomes time to stop, it's also hard to slow down. Why is this?

	inertia
	unbalanced forces
	balanced forces

13.

Select the best answer. Gravity and magnetism are _____ forces.

	contact
	tension
	field
	normal

14.

Select the best answer. As mass _____, gravitational force increases.

	increases
	decreases
	stays the same

15.

Select the best answer.

_____ forces exist between objects that are not in contact with each other.

	Contact
	Normal
	Regular
	Field

16.

Select the best answer.

_____ forces exist when physical contact takes place between two objects.

	Regular
	Contact
	Field
	Normal

17.

Select the best answer. As distance _____, gravitational force decreases.

	decreases
	stays the same
	increases

18.

Solve the word problem.

What would the weight of a 100-kg person be if they were on the planet Saturn? Saturn has an acceleration of gravity equal to. Use

	104 N
	1,040 N
	0.104 N
	10.4 N

19.

Select the best answer.

_____ force is a supportive force that surfaces exert in order to prevent solid objects from passing through one another.

	Field
	Regular
	Contact
	Normal

20.

Select the best answer.

What would happen to two objects of different masses that are dropped in afree fall where there is no air friction or any other forces besides gravity?

	The heavier object would hit the ground first.
	They would fall with an acceleration of 8.9 m/s2.
	They would hit the ground at the same time.
	Both objects would float away.

21.

Select the best answer. _____ is an attractive force between any two objects with mass.

	Inertia
	Momentum
	Friction
	Gravity

22.

Select the best answer. _____ states that in order to overcome inertia, you must apply an unbalanced force to an object.

	The law of inertia
	The law of the conservation of mass
	The law of gravity
	Newton's 1st law of motion