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A light shines from the top of pole 15 m high. A ball is dropped from the same height from a point 9 m away from the light. How fast is the shadow of the ball moving along the ground 1/2 sec later? (Assume the ball falls a distance s = 4.9t^2 m in t sec.).
 one year ago
 one year ago
A light shines from the top of pole 15 m high. A ball is dropped from the same height from a point 9 m away from the light. How fast is the shadow of the ball moving along the ground 1/2 sec later? (Assume the ball falls a distance s = 4.9t^2 m in t sec.).
 one year ago
 one year ago

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