physics- work energy and power

chapter 11

what is work?

the work done is equal to the force by distsnce

W=Fs

what is energy

energy is the ability to do work

what is kinetic energy

energy s body has due to its motion

E_k=1/2mv²

what is potential energy?

is energy due to the height above ground

E_p=mgh

what is power

the rate at which work is done

work/time

what is percentage efficiency?

(useful output power/power input )x100