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Unit 2

Lessons 1,2 and 3

Work the use of force to move a object some distance in the direction of the force
Energy the ability to work
Power the rate at which work is done
Kinetic Energy the energy of motion
Potential Energy the energy an object has because of its position
Mechanical Energy the energy possessed by an object due to its motion and position
Machine any device that helps people do work by changing the way work is done
Mechanical Advantage the number of times the machine multiplies the input force
Mechanical Efficiency a comparison of a machine's work output with the machine's work input
Lever a simple machine that has a bar that pivots at a fixed point
Fulcrum the fixed point on a lever
Wheel and Axel a simple machine that is made of a wheel connected to a smaller cylindrical object, the axel
Pulley a simple machine that has a grooved wheel that holds a rope or a cable
Inclined Plane a simple machine that is a straight, slanted surface
Created by: 18sstern1013