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WorksheetsFriction, Gravity, and Free Body Diagrams
Total questions: 12
Worksheet time: 22mins
Name
Class
Date
1.
A box slides across a floor at a constant velocity. What forces act on the box?
a)
friction, gravity
b)
friction, tension, gravity
c)
friction, normal force, gravity
d)
friction, normal force, net force
2.
A box is moving to the left up a ramp. Which way is the force of friction pointing?
a)
down the ramp to the right
b)
up the ramp to the left
c)
there is no friction
d)
straight up
3.
A box slides across a perfectly smooth floor at a constant velocity. (The phrase "perfectly smooth" suggests that there is NO friction). What forces act on the box?
a)
tension, gravity
b)
tension, gravity, normal force
c)
tension, gravity, normal force, friction
d)
gravity, normal force, friction
4.
What is the direction of the tension force from the attached rope?
a)
there is no tension
b)
straight up
c)
straight down
d)
up the ramp to the right
5.
What forces act on the ball as it moves around the "perfectly smooth" loop? ("perfectly smooth" suggests there is NO friction)
a)
normal, friction, tension
b)
normal, friction
c)
normal, gravity, tension
d)
normal, gravity
6.
What is the direction of the force of gravity acting on the box?
a)
down the ramp to the right
b)
straight up
c)
straight down
d)
up the ramp to the left
7.
What symbol do we use to represent a "body" in a free-body diagram?
a)
small dot
b)
small box
c)
an outline of a human body
d)
small triangle
8.
When completing a free-body diagram, how should you draw the force arrows on the "body"?
a)
with the arrow tail touching the body
b)
with the arrow tip touching the body
c)
it does not need to touch the body
d)
it doesn't matter, tail or tip can touch
9.
What is the Conversation of Momentum?
a)
momentum before a collision is equal to momentum after a collision
b)
to conserve momentum we must not use any
c)
it is good to save momentum for important times
d)
when we transfer momentum between two things, some is lost as heat
10.
Ms. Schmidt comes in the morning and moves a box of textbooks to the right with 50 N of force. Mr. Jensen comes in the afternoon and moves the same box of textbooks to the left with 150 N of force. What is the net (resultant) force?
a)
200 N
b)
100 N left
c)
100 N right
d)
0 N
11.
What are the two ways we can have UNBALANCED forces?
a)
1) unequal forces in opposite directions and 2) forces in same direction
b)
1) forces in same direction and 2) equal forces in opposite direction
c)
1) unequal forces in opposite directions and 2) forces in opposite directions but same sizes
d)
you can't have unbalanced forces, forces will always balance each other out
12.
A box is sliding across a floor while experiencing a frictional force between the box and floor. The box is sliding from left to right. What direction is the force of friction pointing?
a)
up
b)
down
c)
right
d)
left
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