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23 Nov 2019
(a) A ball of mass 0.130 kg is dropped from rest from aheightof 1.25 m. It rebounds from the floor to reach a height of0.920 m.What impulse was given to the ball by the floor?
____________ kg·m/s (b) A potter's wheel -- a thick stone disk of radius 0.500mand mass 105 kg -- is freely rotating at 50.0 rev/min. Thepottercan stop the wheel in 6.00 s by pressing a wet rag againstthe rimand exerting a radially inward force of 65.0 N. Find theeffectivecoefficient of kinetic friction between the wheel andtherag. _____________ (igot .063, but that was the wrong answer)
(a) A ball of mass 0.130 kg is dropped from rest from aheightof 1.25 m. It rebounds from the floor to reach a height of0.920 m.What impulse was given to the ball by the floor?
____________ kg·m/s
____________ kg·m/s
(b) A potter's wheel -- a thick stone disk of radius 0.500mand mass 105 kg -- is freely rotating at 50.0 rev/min. Thepottercan stop the wheel in 6.00 s by pressing a wet rag againstthe rimand exerting a radially inward force of 65.0 N. Find theeffectivecoefficient of kinetic friction between the wheel andtherag. _____________ (igot .063, but that was the wrong answer)
Bunny GreenfelderLv2
2 Feb 2019
