Science - Mechanical Systems 1.5 and 1.6

the ability to do work

an action done whenever a force causes an object to move

the energy of motion

stored energy

energy cannot be created or destroyed, only changed in form

a force that resists movement, resulting in loss of energy through heat

a value indicating how much energy is lost due to friction or heat, expressed as a percentage

Wo/Wi x 100

rotating, wheel like objects with teeth cut ino the rim

a group of gears

driver and follower are the same size, MA=1

Change of direction (MA)

larger driver and smaller follower, MA<1

Speed advantage (MA)

small driver and larger follower, MA>1

Force advantage (MA)

#teeth follower/#teeth driver

the difference between the speeds of 2 gears

Change of direction (SR)

Force advantage (SR)

Speed advantage (SR)

#teeth driver/#teeth follower

turns faster than larger gear

turns slower than smaller gear