Question

A man drops a 10kg rock from the top of a 5m ladder.Calculate the kinetic energy and velocity of the rock just before it hits the ground,

Answer 1

KE JUST BEFORE IT HITS THE GROUNND =POTENTIAL ENERGY AT 5M
=10 X5X 10(ACC DUE TO GRAVITY)
=500JOULE

TO FIND VEOLCITY
KE=1/2MV^2
500x2=10xv^2

v^2=1000/10=100
v=√100=10mper sec

Answer 2

i hope it helps...............