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Q1. A skier of mass 69kg is pulled up a slope by a motor-driven cable.

(a) How much work is required to pull him 65m up a 30° slope (assumed frictionless) at a constant speed of 1.90 m/s?

(b) What power must a motor have to perform this task?

Q2. A bartender slides a beer mug at 1.30 m/s towards a customer at the end of a frictionless bar that is 2.0m tall. The customer makes a grab for the mug and misses, and the mug sails off the end of the bar.

(a) How far away from the end of the bar does mug hit floor?

(b) What are the speed and direction of mug at impact?

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Category:- Physics
Reference No.:- M9169239

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