question_answer 19)

                Ball A: x1 = (u1 cos)t, Ball B: x2 = (u2 cos)t, The positionof the ball A with respect to ball B is given by     Now  constant Thus motion of a projectilerelative to another projectile is a straight line. (12) Energyof projectile : When a projectile moves upward its kinetic energy decreases,potential energy increases but the total energy always remain constant.                      

Answer:

                Ball A: x1 = (u1 cos)t, Ball B: x2 = (u2 cos)t, The positionof the ball A with respect to ball B is given by     Now  constant Thus motion of a projectilerelative to another projectile is a straight line. (12) Energyof projectile : When a projectile moves upward its kinetic energy decreases,potential energy increases but the total energy always remain constant.