A boy travelling on a skateboard steps off the board perpendicular to its motion. After stepping off, the boy lands on the ground and comes to rest. Which one of the following statements is INCORRECT? A The boy exerts an impulse on the ground on impact B The ground exerts an impulse on the boy on impact C The momentum possessed by the boy before the collision is shared with the earth D The momentum possessed by the boy before the collision is transformed to heat Would the answer be D because momentum is not a form of energy; rather, it is a measurement which shows the tendency of an object to move in its line of direction. Furthermore, can the ground exert an impulse on objects such as bouncing balls, etc?