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.
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