Question

A body of mass 2 kg is dropped from a height of 1m. its kinetic energy as it touches the ground is

Answer 1

m=2kg
h=1m
g=10m

so As we know that kinetic energy + Mechanical energy =mgh

so
by formula
F=mgh
2*1*10
20N


so we know that mechanical energy requires height so at ground it is 0.
so 20N+0=mgh
or we can say kinetic energy 20N