Question

Find out the potential energy of a body pf mass 50kg if it is lifted to a height of 3m. Now this body is allowed to fall freely, then find the kinetic energy of the body when it is exactly half way.(g = 10m/s^2)

Answer 1

Answer:

750j

Explanation:

here,mass=50kg, height(h)=3m,g=10, half of h=s=1.5m

now,

when body falling freely from height 3m so , initial velocity (u)=0 ,now use displacement formula for time calculation s=ut+1/2gt^2, from here we get time then use this time in , equation,v=u + gt, from here we get v (final velocity), After getting this we can calculate kinetic energy=1/2mv^2=750j