Projectile motion of ball 3

A ball AA is thrown horizontally, and at the same time, another ball BB is thrown with an angle of θ\theta to the horizontal line, as shown above. The horizontal throw lengths of the two balls are the same, which is ss in the picture, and the landing point of both balls is the point PP on the floor. Until the ball AA arrives at P,P, which of the following statements is correct?

a) The two balls arrive at PP at the same time.

b) The accelerations of the two balls are the same.

c) The velocity of the ball BB relative to that of the ball AA is constant.

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