CH2 Work and Energy

Question 1

Kinetic energy? equation?

Answer 1

is the energy of motion

KE= 1/2 mv²

KE= Jules (kgm2/s2)

Question 2

Potential Energy? Equation?

what about for springs? elastic PE?

total mechanical energy?

Answer 2

U=mgh

mass x gravity x height

U= 1/2kx²

k= spring constant x=maginitude of displacement

E= KE + PE

Question 3

Work, equation and with pressure

Power?

Answer 3

Work: Measure of energy transfer

W = F x d = Fd cos@

W = P x V

@ is the angle b/w the force and displacement vector

Power: rate at which energy is transferred

P = W/t

P=watts