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15 Cards in this Set
- Front
- Back
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What are the three types of friction
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rolling friction, static friction, sliding friction
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What is Newton's First Law of Motion?
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If there is no net force acting on an object the object remains at rest, or if the object is already moving, it continues to move in a straight line with constant speed
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What is Newton's Second Law of Motion
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an object acted upon by a force will accelerate in the direction of the force.
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How do we define weight in science?
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It is the gravitational force between you and Earth
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What is Newton's Third Law of Motion?
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Forces always act in equal but opposite pairs. For every action there is an equal and opposite reaction.
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List the six simple machines
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inclined plane, wedge, screw, lever, wheel and axle, and pulley
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A force is a _______ or a________
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push, pull
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What is net force
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the combination of all the forces acting on an object
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What two things have to happen for work to be done?
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1) must apply a force to an object
2) Object must move in the same direction as you applied the force |
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What is power?
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How quickly work is done
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What is mechnical advantage?
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The number of times the input force is multiplied by a machine
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What is the equation for mechanical advantage?
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MA = output force
input force |
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What is a simple machine?
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A machine that does work with only one movement
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Define instantaneous speed
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The speed of an object at one instant of time
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Define mass
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The amount of matter or space an object takes up
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