(b ) Use the Energy Principle to determine the maximum height above your hand reached by the ball. h = 11.7723 11.8 m Solution or Explanation Apy = m ( Vy, final vy, initial) = Fy,extAt, where Fyext = mg. Choose the final state to be when the ball crests and momentarily has zero momentum. Therefore we have m (0 vy initial) = mgAt Solve for the initial speed : v , initial = gAt AE = W 2m ( v/ v ?) = Fy extAy 1 2 m (0 v ; 2 ) = ( mg ) (h ) h = u