WorksheetsFriction
Total questions: 12
Worksheet time: 13mins
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.
Which of the following is an example of friction that is helpful?
a)
Brakes used on a bike
b)
Tires from a car on the road
c)
Tread on the bottom of your shoes
d)
All are examples that are helpful
4.
How would the absence of friction affect a marble traveling on a long, straight path?
a)
The marble’s speed would decrease.
b)
The marble’s speed would increase.
c)
The marble would stop immediately.
d)
The marble would remain at constant speed.
5.
Rougher surfaces have ...
a)
greater friction
b)
less friction
c)
the same level of friction
6.
FN=100N, Ff=20N
a)
μ=5.0
b)
μ=0.2
c)
μ=1.2
d)
μ=0.1
7.
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
8.
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
9.
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
10.
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
11.
For friction on an incline, what direction does Fp point?
a)
Always perpendicular to the surface
b)
Always down the incline and parallel to the surface
c)
Always up the incline and parallel to the surface
d)
It depends on the direction of motion
12.
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
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