Question

What is the kinetic energy of an object with a mass of `15 kg` that has been in freefall for `2 s`?

Answer 1

After free fall of 2s it will gain velocity `v=0+gxxt=9.8xx2m/s=19.6m/s`
Hence the kinetic energy gained =`1/2xxmxxv^2=1/2xx15xx(19.6)^2J=2881.2J`