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Get Full Access to University Physics - 13 Edition - Chapter 9 - Problem 87p
Get Full Access to University Physics - 13 Edition - Chapter 9 - Problem 87p

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# Solved: Two metal disks, one with radius R1 = 2.50 cm and

ISBN: 9780321675460 31

## Solution for problem 87P Chapter 9

University Physics | 13th Edition

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University Physics | 13th Edition

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Problem 87P

Two metal disks, one with radius R1 = 2.50 cm and mass M1 = 0.80 kg and the other with radius R2 = 5.00 cm and mass M2 = 1.60 kg, are welded together and mounted on a frictionless axis through their common center (?Fig. P9.77?). (a) What is the total moment of inertia of the two disks? (b) A light string is wrapped around the edge of the smaller disk, and a 1.50-kg block is suspended from the free end of the string. If the block is released from rest at a distance of 2.00 m above the floor, what is its speed just before it strikes the floor? (c) Repeat part (b), this time with the string wrapped around the edge of the larger disk. In which case is the final speed of the block greater? Explain.

Step-by-Step Solution:

Solution 87P Problem (a) Step 1: Radius of disk 1 R = 210 cm or 2.5 x 10 m -2 Radius of disk 2 R = 5.00 cm or 5.0 x 10 m -2 2 Mass of disk 1 M = 01 kg Mass of disk 2 M = 12 kg

Step 2 of 2

##### ISBN: 9780321675460

The answer to “Two metal disks, one with radius R1 = 2.50 cm and mass M1 = 0.80 kg and the other with radius R2 = 5.00 cm and mass M2 = 1.60 kg, are welded together and mounted on a frictionless axis through their common center (?Fig. P9.77?). (a) What is the total moment of inertia of the two disks? (b) A light string is wrapped around the edge of the smaller disk, and a 1.50-kg block is suspended from the free end of the string. If the block is released from rest at a distance of 2.00 m above the floor, what is its speed just before it strikes the floor? (c) Repeat part (b), this time with the string wrapped around the edge of the larger disk. In which case is the final speed of the block greater? Explain.” is broken down into a number of easy to follow steps, and 139 words. This full solution covers the following key subjects: string, Block, mass, around, radius. This expansive textbook survival guide covers 26 chapters, and 2929 solutions. Since the solution to 87P from 9 chapter was answered, more than 1133 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: University Physics, edition: 13. The full step-by-step solution to problem: 87P from chapter: 9 was answered by , our top Physics solution expert on 05/06/17, 06:07PM. University Physics was written by and is associated to the ISBN: 9780321675460.

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