Question

a body of mass 2 kg is dropped from a height of 5 metre what is the velocity of the body before touching the ground

Answer 1

the mass body..2kg
h...5meter
g...9.8meter per second2
v=98m/s2

Answer 2

by conservation of mechanical enengy,
PE = KE
mgh = 1/2mv^2
gh = 1/2 v^2
10 * 5= 1/2 v^2
100 = v^2
v= 10m/s.