Two friends A and B (each weighing 40 kg) are sitting on a frictionless pltform some distance d apart. A rolls a ball of mass 4 kg on the platform towrds B which B catches. Then B rolls the ball towards A and A catches it. The ball keeps on moving back and forth between A and B. The ball has a fixed speed of 5 m/s on the platform. a. Find the speed of A after he rolls the ball for the first time. b. Find the speed of A after he cathces teh ball for the first time. c. Find the speed s of A and B after the ball has made 5 round trips and is held by A. d. How many times can A roll theball? e. where is the centre of mas the system A+B+ ball at the end of the nth trip?

Two friends A and B (each weighing 40 kg ) are sitting on a frictionless platform some distance d apart. A rolls a ball of mass 4 kg on the platform towards B which B catches. Then B rolls the ball towards A and A catches it. The ball keeps on moving back and forth between A and B . The ball has a fixed speed of 5 m//s on the platform. a. Find the speed of A after he rolls the ball for the first time. b. Find the speed of A after he catches the ball for the first time. c. Find the speed of A and B after the ball has made five round trips and is held by A . d. How many times can A roll the ball? e. Where is the centre of mass of the system A + B + ball at. the end of the nth trip?

Two friends A and B (each weighing 40 kg ) are sitting on a frictionless platform some distance d apart. A rolls a ball of mass 4 kg on the platform towards B which B catches. Then B rolls the ball towards A and A catches it. The ball keeps on moving back and forth between A and B . The ball has a fixed speed of 5 m//s on the platform. a. Find the speed of A after he rolls the ball for the first time. b. Find the speed of A after he catches the ball for the first time. c. Find the speed of A and B after the ball has made five round trips and is held by A . d. How many times can A roll the ball? e. Where is the centre of mass of the system A + B + ball at. the end of the nth trip?

A ball of mass 1kg is dropped from a height of 5m. (a) Find the kinetic of the ball just before it reaches the ground (b) What is the speed at this instant?

A ball of mass 1 kg strink a heavy platform, elastically, moving upwards with a velocity of 5 m//s . The speed of the ball just begore the collision is 10 m//s downwards. Then the impulse imparted by the platform on the ball is :-

A ball of mass 1 kg strikes a heavy plarform elastically, moving upwards with a velocity of 5 m//s . The speed of the ball just before the collision is 10 m//s downwards. Then the impulse imparted by the platform on the ball is

A ball of mass 1 kg strikes a heavy plarform elastically, moving upwards with a velocity of 5 m//s . The speed of the ball just before the collision is 10 m//s downwards. Then the impulse imparted by the platform on the ball is