Question

An object of mass 10 kg is dropped from a height of 5m above the ground. Show that the total energy of the object ato 5m and 2m is same.(g=10m/s square). What happens to the energy when object touches the ground??

Answer 1

see at the highest point ie at 5m the body or the object will have only potential energy as its velocity initially is 0 therefore appy
mgh at this point the energy will be 500joule .
at 2 m the velocity it will attain will be given by
$\sqrt{2gh}$
and the h will be 5 m an then apply kinetic energy equation.