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Force and Motion Review
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Name 3 types of friction.
sliding, static, rolling, fluid
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Movement results from _________________ forces.
unbalanced
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Which type of variable is kept the same for each test - It's what keeps the test fair?
control variable
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What is the difference between mass and weight?
mass is the amount of matter in something; weight is a measure of gravity pulling on mass
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What term refers to the sum of all of the forces acting on an object?
net force
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What unit is used to measure force?
newton
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Which type of variable is the thing YOU control - the thing you change in each test?
independent variable
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Which force is pulling toward the center of the Earth?
gravity
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Name the 3 ways an object can accelerate.
speed up, slow down, change direction
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What is a force?
a push or a pull
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How do we calculate speed?
distance divided by time
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What 2 factors influence the pull of gravity?
mass and distance
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Which type of variable is the result - It's the data that you collect?
dependent variable
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Which force pushes in the opposite direction and causes things to slow down?
friction
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If forces are _______________, no movement occurs.
balanced
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If David pushes on a wall with a force of 50 n, how hard does the wall push back on him?
50n
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What force is pulling toward the center of the Earth?
gravity
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