What is the kinetic energy of an object with a mass of #2 kg# that has been in freefall for #4 s#?
The kinetic energy will be 1537 J.
Its kinetic energy will be
You can also find this by conservation of energy methods
During the 4s it will fall a distance of
The decrease in potential energy of the body will be
This decrease in potential energy will equal its increase in kinetic energy.