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Cards In This Set
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What is potential energy?
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Energy due to position or condition (stored energy). Example: holding a rock at the top of a roof
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What is kinetic energy?
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Energy in motion
Example: a ball going through a hoop
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What is an example of a first class lever?
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A seesaw - fulcrum is in the middle.
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What are some examples of simples machines?
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Inclined Plane, Lever, Pulley, Wedge, Wheel and Axle
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What is does the law of the conservation of energy tell us?
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Whatever energy you put in is the same amount of energy you get back. No energy disappears or is added.
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If a man lifts a box onto a truck and another man pushes the same box up an inclined plane into the truck - Who does more work?
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Neither - they both do the same amount of work. Work = Force x Distance
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What is Newton's 3rd Law?
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For every action, there is an equal and opposite reaction.
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What is Newton's 2nd Law?
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Force = Mass x Acceleration
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What is Newton's 1st Law?
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An object in motion stays in motion until acted on by another force?
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How does a lever make work easier?
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A longer lever increases the distance reduces the the force.
W = Force x Distance
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What is an example of a 2nd class lever?
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A wheelbarrow. Fulcrum is at the end, resistance is in the middle, effort is at the end.
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What kind of simple machine is a screw?
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An inclined plane wrapped around a cylinder.
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What is an example of a 3rd class lever?
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A shovel. Fulcrum at one end, effort force in the middle, resistance at the end.
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If a large brick and a small rock were dropped at the same time, which would hit the ground first?
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Both will hit the ground at the same time because gravity is pushing them at the same rate.
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What does aerodynamic mean?
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It means that an object has very little drag/air resistance.
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