Question

A rock of mass 200kg is dropped from a height of 200m.what is kinetic energy at 2seconds?

Answer 1

Answer:

mass,m=200kg. time,t=2s

height,h=200m

Kinetic energy,K= 1/2 mv^2

=200❌(200)^2/2

= 200❌40000 /2

= 4❌10^6 Joules(J).