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Week 4 force

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
machine   something that replaces human effort and makes work easier.  
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simple machine   A tool that makes work easier; has few or no moving parts.  
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energy   the ability to do work.  
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work   The ability to move something  
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wheel and axle   a simple machine consisting of a grooved wheel turned by a cord or chain with a firmly attached axle together with supports.  
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lever   a simple machine consisting of a solid bar that rotates around a pivot point; used to lift objects.  
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pulley   a simple machine made up of a rope wrapped around a wheel. When a downward force is applied on the rope, an upward force is created.  
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screw   a simple machine made up of a shaft with grooves that wrap around it going from top to bottom.  
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inclined plane   an object with a flat, tilted surface, a simple machine that helps things roll or slide upward off the ground.  
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wedge   a simple machine that can be used to split objects apart, hold objects in place, or lift objects from the ground; consists of two inclined planes joined together.  
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