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23 Terms
power
the rate of doing work
work
the transfer of energy when a force moves on an object
Joules
measurement of energy
watts
rate at which electrical power flows through a system
pulley
changes direction of force
fulcrum
fixed point a lever pivots around
screw
inclined plane wrapped around a cylinder
mechanical advantage
Ratio of output force to input force
wedge
increases force by converting a single input into 2 separating forces
energy
the ability to cause change or do work
kinetic energy
energy due to motion
transformation
energy changes from one form to another
potential energy
energy stored because of an objects position
elastic energy
found in elastic like rubber band
chemical energy
energy stored in food fuels
radiant energy
transferred by electromagnetic waves, like light
thermal
random motion of particles and is felt as temperature
sound energy
transferred through compression waves
simple machines
devices that make work easier
inclined plane
flat supporting surface tilted from the vertical direction
wedge
2 inclined planes put together
wheel and axle
Continuous rotation around a fixed point