The 200-g projectile is fired with a velocity of 900 m/s towards the center of the 15-kg wooden block, which rests on a rough surface. If the projectile penetrates and emerges from the block with a velocity of 300 m/s, determine the velocity of the block just after the projectile emerges. How long does the block slide on the rough surface, after the projectile emerges, before it comes to rest again? The coefficient of kinetic friction between the surface and the block is p, = 0.2. 900 m/s Before 300 m /s After If the girl throws the ball with a horizontal velocity of 8 m/s, determine the distance d so that the ball bounces once on the smooth surface and then lands in the cup at C. Take e = 0.8. A A\\ _ =@ T' i I m B L d - The 1-kg ball is dropped from rest at point A, 2 m above the smooth plane. If the coefficient of restitution between the ball and the plane is e = 0.6, t determine the distance d where the ball again strikes the plane. Disks A and B have a mass of 15 kg and 10 kg, respectively. If they are sliding on a smooth horizontal plane with the velocities shown, determine their speeds just after impact. The coefficient of restitution between them is e = 0.8