Question

An object of mass 5 kg is dropped from a certain height. Just before it strikes the ground it has a kinetic energy of 1250 J. From what height was the object dropped? Ignore air resistance and use g = 10 m/s2.

Answer 1

PE at start=KE at end
mgh=final KE

solve for h

Answer 2

a body is thrown up with a velocity of 20 m/s . calculate the maximum height attained by the body.