In a shotput event an athlete throws the shotput of mass 10 kg with an initial speed of 1 m s–1 at 45° from a height 1.5 m above ground. Assuming air resistance to be negligible and acceleration due to gravity to be 10 m s–2, the kinetic energy of the shotput when it just reaches the ground will be
1
2.5 J
2
5.0 J
3
52.5 J
4
155.0 J