a boy throws a ball 1 meter into the air. at the highest point in the air the ball has a gravitational potential energy of 20 J. how much potential energy would it have if the boy threw it 2 meters into the air?

The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s