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Force and Motion Post CFA
By Stacey Gregory
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Last updated about 6 years ago
13 questions
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Question 1
1.
Question 2
2.
Question 3
3.
Question 4
4.
Question 5
5.
Question 6
6.
Question 7
7.
Question 8
8.
Why do we use simple machines?
Question 9
9.
Question 10
10.
Question 11
11.
Think about a spiral staircase. Which simple machine can you compare it to? Explain.
Question 12
12.
You do not use a much _________ when you use simple machines.
Question 13
13.
Choose one of the simple machines we have studied (pulley, screw, inclined plane, lever, wheel and axle, wedge)
and explain how it makes our work easier.
The idea that an object in motion will stay in motion unless an unbalanced force acts upon it is...
A. work
B. inertia
C. gravity
Kinetic energy
A push or pull that causes an object to start moving, stop moving, or change direction is called ...
A. force
B. gravity
C. friction
D. weight
________ is the force that keeps us on Earth, it pulls objects towards the center of the Earth.
A. friction
B. Speed
C. gravity
D. motion
What is friction?
A. a change in velocity
B. a force that acts when two surfaces rub together
C. a push or pull
D. how much something weighs
What force holds the moon in its orbit around Earth?
A. friction
B. gravity
C. position
D. weight
_________ is how far something moves over a certain amount of time.
A. force
B. motion
C. speed
D. inertia
Raising a flag uses which of the following simple machines?
A. wheel and axle
B. screw
C. lever
D. pulley
What type of simple machine is a crowbar?
A. wedge
B. lever
C. inclined plane
D. screw
Which type of simple machine would you need if you were pushing someone in a wheelchair?
A. pulley
B. wheel and axle
C. inclined plane
D. screw