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Q1. Heather and Jerry are standing on a bridge above a river. Heather throws a rock straight down with a speed of. Jerry, at exactly the same instant of time, throws a rock straight up with the same speed. Overlook air resistance

Q2. To test the deflection of the uniform 200-lb beam the 121-lb boy exerts a pull of 36 lb on the rope rigged. Calculate the force supported by the pin at the hinge O.

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