Question

An object of mass 40 kg is raised to a height 5 m above the ground. what is its p.e.? if object is allowed to fall, find its k.e. just before touching the ground and also its k.e. when it is half way down.

Answer 1

PE = mxgxh
PE = 40x10x5
PE = 2000J

G= 10N

Since V not given

Look above page ☝️
After that look down

KE = 1/2xmxv^2
KE = 1/2x40x10^2
KE = 2000J

I know only till this much sorry.

Answer 2

200 0joule

2000joule
100 0joule