A ball is thrown with an initial speed of 20 ?/? from one end of a horizontal platform with a length of 48 ? and a height of 32 ? at angle of 37° to the the horizontal. At the same time a man who is standing on the ground starts from rest and moves with a constant acceleration of ?(see Figure). (a) Find the time of flight of the ball (b) What should be the acceleration of the man so that he can hold the ball before it falls? cos53o =sin37o=0.6 cos37o =sin53o=0.8 g=9.8 m/s2

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Projectile Motion