1. What type of friction acts on objects that are not moving?
static
sliding
rolling
fluid

2. What type of friction acts on objects that are not moving?
static
sliding
rolling
fluid

3. What happens to an object when a balanced force acts on it?
The object accelerates.
The object decelerates.
The object changes direction.
The object does not move.

4. What happens to an object when a balanced force acts on it?
The object accelerates.
The object decelerates.
The object changes direction.
The object does not move.

5. You push on a box. What type of friction acts on the box once it begins moving?
Static friction
Rolling friction
Sliding friction
Fluid friction

6. You push on a box. What type of friction acts on the box once it begins moving?
Static friction
Rolling friction
Sliding friction
Fluid friction

7. To produce a projectile, what two forces combine?
gravity and a vertical force
centripetal force and a vertical force
gravity and a horizontal force
inertia and a horizontal force

8. To produce a projectile, what two forces combine?
gravity and a vertical force
centripetal force and a vertical force
gravity and a horizontal force
inertia and a horizontal force

9. The following forces act on an object. What is the net force
The following forces act on an object. What is the net force? What is the object’s motion?
3 N N N
The net force is 12 N and the object does not move.
The net force is 6 N and the object moves left.
The net force is 0 and the object does not move.
The net force is 12 N and the object moves to the right.

10. The following forces act on an object. What is the net force
The following forces act on an object. What is the net force? What is the object’s motion?
3 N N N
The net force is 12 N and the object does not move.
The net force is 6 N and the object moves left.
The net force is 0 and the object does not move.
The net force is 12 N and the object moves to the right.

11. What force acts on the protons and neutrons in an atom?
gravitational force
centripetal force
strong nuclear force
weak nuclear force

12. What force acts on the protons and neutrons in an atom?
gravitational force
centripetal force
strong nuclear force
weak nuclear force

13. What is the center-directed force that causes the moon to orbit the Earth?
gravitational force
centripetal force
strong nuclear force
weak nuclear force

14. What is the center-directed force that causes the moon to orbit the Earth?
gravitational force
centripetal force
strong nuclear force
weak nuclear force

15. What type of friction is the most difficult to overcome?
static
sliding
rolling
fluid

16. What type of friction is the most difficult to overcome?
static
sliding
rolling
fluid

17. The tendency of an object to resist a change in its motion is
gravitational force.
centripetal force.
inertia.
electromagnetic force

18. The tendency of an object to resist a change in its motion is
gravitational force.
centripetal force.
inertia.
electromagnetic force

19. What is the force that acts on charged objects or particles?
gravitational force
centripetal force
strong nuclear force
electromagnetic force

20. What is the force that acts on charged objects or particles?
gravitational force
centripetal force
strong nuclear force
electromagnetic force

21. Which statement is not true according to Newton’s First Law of Motion?
An object at rest will remain at rest.
An object in motion will remain in motion at a constant speed.
A force is needed to change the motion of an object.
A object in motion will remain in motion in a curved path.

22. Which statement is not true according to Newton’s First Law of Motion?
An object at rest will remain at rest.
An object in motion will remain in motion at a constant speed.
A force is needed to change the motion of an object.
A object in motion will remain in motion in a curved path.

23. An orange might roll off your cafeteria tray when you stop suddenly because
the balanced forces acting on the orange.
the friction forces acting on the orange.
the orange’s inertia.
the centripetal force acting on the orange.

24. An orange might roll off your cafeteria tray when you stop suddenly because
the balanced forces acting on the orange.
the friction forces acting on the orange.
the orange’s inertia.
the centripetal force acting on the orange.