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27 Cards in this Set
- Front
- Back
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You can do work because you have potential _________.
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energy
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wheel and axle
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a simple machine made of a wheel attached to a rod
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inertia
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inertia is the tendency of a moving object to stay in motion or a resting object to stay at rest
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work
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the result of a force moving an object
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compound machine
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a machine made of two or more simple machines
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potential energy
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energy that an object has because of position
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chemical energy
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energy that comes from a chemical change
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What are two effects that forces can have on motion?
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start moving, speed up, slow down, stop, or change direction
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The tendency of an object to stay in motion until a force stops it is called_________.
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inertia
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How is a ball tossed in the air like a roller coaster car rolling down a track?
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Gravity is acting on both objects.
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gravity
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gravity is the force that pulls two objects toward one another because of their mass
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inclined plane
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is a simple machine with a flat surface and one end higher than the other
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When you apply the brakes on your bike, the brakes rub against the wheel and cause_______.
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friction
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A roller coaster car goes up and down because it is moved by a
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force.
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simple machine
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a machine of one or two parts
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The force of------is what pulls a roller coaster car to the earth.
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gravity
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Force
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force is a push or pull on an object that can cause it to change motion
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mechanical energy
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the kind of energy an object has because it can move or is moving
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screw
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a simple machine consisting of an inclined plane wrapped around a rod
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Describe how friction affects the motion of an object.
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Friction rubs - this rubbing changes the energy level- this will cause the object to slow down or stop.
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energy
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the ability to do work
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complex machine
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a machine made of many simple and compound machines
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pulley
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a simple machine that uses a rope and a wheel
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friction
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a force that slows the motion of moving objects
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kinetic energy
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is the energy of motion
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electrical energy
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energy that comes from the flow of electricity
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wedge
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a simple machine that has slanted sides
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