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# CP A stone is suspended from the free end of a wire that

ISBN: 9780321675460 31

## Solution for problem 14E Chapter 10

University Physics | 13th Edition

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University Physics | 13th Edition

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Problem 14E

CP ?A stone is suspended from the free end of a wire that is wrapped around the outer rim of a pulley, similar to what is shown in Fig. 10.10. The pulley is a uniform disk with mass 10.0 kg and radius 50.0 cm and turns on frictionless bearings. You measure that the stone travels 12.6 m in the first 3.00 s starting from rest. Find (a) the mass of the stone and (b) the tension in the wire.

Step-by-Step Solution:

Solution 14 E Step 1: Data given Mass of pulley M = 10.0 kg Radius R = 50.0 cm Distance travelled d = 12.6 m Time taken t = 3.00 s We shall find the acceleration of the stone down the rope It is obtained using 2 d = ut + 1/2at Here the initial distance u = 0 Hence we have 2 d = (1/2) × at Substitute the values we get 2 12.6 m = (1/2) × a × (3.00 s) Rearrange to find “a” 12.6 m 0.5 ×(3.00) a a = 2.8 m/s 2

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CP A stone is suspended from the free end of a wire that