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work work=force x distance
power power= work/time
weight/force weight/force: mass x gravity (9.8 m/s2)
kinetic energy kinetic energy= 1/2 x mass x velocity
mechanical advantage =output force/input force
efficiency =output work/input work x 100
mechanical advantage of an inclined plane =length/height
mechanical advantage of a wheel and axel =radius of wheel/radius of axel
mechanical advantage of a pully =number of ropes supporting the object
velocity velocity=gravity x time
acceleration acceleration= force/ mass
momentum momentum= mass x velocity
gravitational potential energy =weight x height
mechanical energy =potential energy + kinetic energy