A 0.1000-kg marble is fired by a boy from a slingshot at point A, at a height of 1.500 m from the ground. It hits a frictionless inclined concrete wall at point B, which is 30.0 m away from the boy. After hitting the wall, the marble rebounds with a velocity, VB, directed 140° from the horizontal as shown. The ball finally hits point C on the frictionless floor. The velocity of firing, VA, is 20.0 m/s, directed 45.0° with the horizontal. VA 20 m/s = A 45° 1.5 m C! VB 60° B o = 140°

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