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simple machines Answer Key

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Examples of Simple Machines
#1 Draw an example of a lever. Show me your picture.
#2 Draw an example of a screw. Show me your picture.
#3 Draw an example of a pulley. Show me your picture.
#4 Draw an example of an inclined plane. Show me your picture.
#5 Draw an example of a wedge. Show me your picture.
Simple Machine Vocabulary
#1 a push or pull. What is force?
#2 a change in position What is motion?
#3 when a force moves an object, __________ is done. What is work?
#4 the measure of how fast something moves over a certain distance What is speed?
#5 the force that pulls objects towards each other What is gravity?
More Vocabulary
#1 a measure of the pull of gravity on an object What is weight?
#2 a tool that helps people do work What is a simple machine?
#3 a flat surface that is higher on one end than the other What is an inclined plane?
#4 a bar that moves on or around a fixed point What is a lever?
#5 the fixed point on a lever What is a fulcrum?
Uses of Simple Machines
#1 This can be used to chop wood. What is a wedge?
#2 A see-saw is an example of this simple machine. What is a lever?
#3 This can be used to pull a bucket out of a well. What is a pulley?
#4 The door knob could not be turned without this. What is a wheel and axle?
#5 This is part of a lid so I can close the peanut butter jar. What is a screw?
Do You Remember?
#1 Books move better atop four pencils because __________ is reduced. What is friction?
#2 To lift a lion with a lever it would be better to use a long bar. Why? What is you would need less effort?
#3 If the ___________ side is longer than the Load side on a lever you will have leverage. What is force?
#4 The opposite of a force side on a lever. What is the load side?
#5 When I'm going down a hill in a wagon, I am using a wheel and axle. I'm also using ___________. What is gravity?
Final Question