question_answer

Three objects A, B and C are kept in a straight line on a frictionless surface. These have masses m, 2m and 2m, respectively. The object A moves towards B with a speed 9 m/s and makes an elastic collision with it. Thereafter, B makes an elastic collision with C. All motions occur on the same straight line. The final speed (in m/s) of object B is found to be x. Find the value of 'x'.

Answer:

0.00