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WorksheetsFriction Problem Review
Total questions: 11
Worksheet time: 3hrs 45mins
Name
Class
Date
1.
The amount of friction depends on the normal force of the objects pressing together.
a)
True
b)
False
2.
What type of friction is not moving?
a)
static
b)
sliding
c)
fluid
d)
rolling
3.
Rougher surfaces have ...
a)
greater friction
b)
less friction
c)
the same level of friction
4.
FN=100N, Ff=20N
a)
μ=5.0
b)
μ=0.2
c)
μ=1.2
d)
μ=0.1
5.
What direction does friction act relative to motion?
a)
in the same direction
b)
in the opposite direction
c)
need more information
d)
depends on the force
6.
What is the coefficient of static friction if it takes 44 N of force to move a box that weighs 86 N?
a)
0.78
b)
0.51
c)
0.78 N
d)
0.58 N
7.
A box takes 40 N to start moving when the coefficient of static friction is .54. What is the weight of the box?
a)
81 N
b)
18 N
c)
98 N
d)
74 N
8.
When looking at friction problems, if the net force in the x-direction on an object is zero, what can we say about its acceleration?
a)
it is positive
b)
it is negative
c)
it is zero
d)
not enough information is given
9.
Normal force is
a)
Always opposite the weight
b)
Always parallel and down the incline
c)
Always perpendicular to the surface
d)
It depends on the direction of motion
10.
What is the unit called that measures force?
a)
weight
b)
meter
c)
Newton
d)
kilogram
11.
What are the units on the coefficient of friction?
a)
none
b)
Newtons
c)
meters
d)
kilograms
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