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Unformatted text preview: being accelerated to the right as shown. The acceleration is of magnitude such that the block does not move relative to the wedge. a. In the inertial frame of the drawing, what force is doing work on the block to increase its speed? b. Find the acceleration a in terms of g and θ . c. In the non-inertial frame of the wedge, the block is at rest. What must be the direction of g eff in that frame? a. The horizontal component of the normal force. b. Horizontal forces: N sin = ma . Vertical forces: N cos = mg = . Eliminate N to ±nd a = g tan . c. The weight m g eff and the normal force N must cancel, so g eff must be opposte to N , i.e., perpendicular to the incline, inward. a Physics 53 Summer 2010 2...
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