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Chapter 2 Study Sheet
Name: _______________________________
Match the vocabulary words with their definition.
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2.
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18.
____ force
____ contact force
____ noncontact force
____ net force
____ unbalanced force
____ balanced force
____ Newton’s 1st Law
____ gravity
____ law of universal gravitation
____ weight
____ friction
____ elastic force
____ tension force
____ compression force
____ normal force
____centripetal force
____ Newton’s 2nd Law
____ Newton’s 3rd Law
A. Is the net force of an object is zero, an object at rest stays at rest of an object in
motion stays in motion
B. When the net force of an object is not zero
C. When one object exerts a force on a second object, the second object exerts an
equal force in the opposite direction on the first object
D. Gravitational force exerted on an object
E. Force that one object exerts on another when they are not touching
F. Pushing force exerted by a material when it is squeezed or compressed
G. Force exerted by material when it is stretched or compressed
H. Force exerted only when two objects are touching
I. Force that is perpendicular to the velocity and toward the center of the circle
J. When the net force of an object is zero
K. Pulling force exerted by a material when it is stretched
L. Attractive force that exists between all objects that have mass
M. Push or a pull
N. The acceleration of an object equals the net force divided by the object’s mass
O. The combination of all the forces acting on an object
P. Force that opposes the movement between two surfaces in contact
Q. All object are attracted to each other with a force that depends on the masses of
the objects and the distance between them
R. Force exerted by an object that is perpendicular to the surface of the object
19. A force must include: a.___________________________ and b. ___________________________________
20. What do you need to know to determine the net force? __________________ and ___________________
21. A force of 20N is applied to an object in a positive direction and a force of 10N is applied in the negative
direction. What is the resulting force? ___________________
22. How much force is needed to stop the bicycle?
23. What forces act on a basketball flying in the air?
24. How are inertia and mass related?
25. If gravity on earth increased, how would this affect the solar system? If gravity decreased?
26. As the mass of one or more objects increases, the gravitational force becomes (stronger/weaker).
27. You are moving into a new house and packing boxes of kitchen supplies. Box A weighs 400g and box
B weighs 200g. In order to push both boxes with the same speed, what will you need to do?
28. Susie is pulling a wagon with a watermelon in it. As she continues to shop at the farmers market, she
adds more fruits and vegetables to her wagon. She does not change the amount of force she is using
to pull the wagon. What is happening to the speed of the wagon?
29. Label forces A, B, and C.
30. Circle the objects that need a larger force to overcome inertia.
Bus/Bike
Dog/Bear
Truck/Motorcycle
School Bus/Car
31. Stretching force works in opposition to ___________________
32. Solve for the following net forces. Draw the net force and label it:
a.
20N
30N
50N
75N
75N
25N
10N
5N
15N
25N
b.
c.
d.
e.