1.
In a shot-put event, an athlete throws the shot-put of mass 10kg10\,\text{kg} with an initial speed of 1m/s1\,\text{m/s} at 4545^\circ from a height of 1.5m1.5\,\text{m} above the ground. Assuming air resistance to be negligible and acceleration due to gravity to be 10m/s210\,\text{m/s}^2, the kinetic energy of the shot-put when it just reaches the ground is