A student who weights 500 n climbed the stairs the first floor to the third floor, 15 m above, in 20 sec.
how much work did she do?
what was her power?

Ahockey player of mass 82 kg is traveling north with a velocity of 4.1 meters per second he collides with the 76 kg player traveling east at 3.4 meters per second if the two players locked together momentarily in what direction will they be going immediately after the collision how fast will they be moving