29. Consider two lumps of clay (A and B) moving towards each other at a speed of v (v is relative to the ground). If clay A has a mass 4.6 times as great as clay B, what fraction of kinetic energy is lost after collision? Express your answer in decimal form with two decimal places. 30. A ball of mass 1.978 kg is thrown upward with a speed of 8.753 m/s. What is the magnitude of the impulse caused to the ball by the gravity when the ball reached the peak height? Express your answer in two decimal places with units of kg-m/s