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# What is the distance from the Earth’s center to a point ISBN: 9780130606204 3

## Solution for problem 35P Chapter 5

Physics: Principles with Applications | 6th Edition

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Problem 35P

Problem 35P

What is the distance from the Earth’s center to a point outside the Earth where the gravitational acceleration due to the Earth is of its value at the Earth’s surface?

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Step 1 of 3

Solution 35P When the torque is applied on an object that rotating about field axis then that object will undergo angular acceleration.the angular acceleration is quantitative expression of the change in angular velocity that a spinning object undergoes per unit area. The angular acceleration in terms of torque is defined as torque=(moment of inertia)*(angular acceleration) = I = /I The moment of inertia about an axis passing through center of axis is I = mr /2 Where r is radius of disk. To solve this problem we have to knowing some concepts like torque,moment of inertia,rotational dynamics and rotational kinematics. Given data: Mass of the plastic disk m = 200 g = 0.2 kg Radius of disk is r = d/2 = 20/2 = 10 cm = 0.1 m The moment of inertia of the disk is given by I = mr /2 2 I = (0.2 kg)(0.1 m) /2 I = 0.001 kg/m 2 Initial angular speed w = 0i 2 w r 1800 rpm = 1800(2)/(60 rad/s) = 60 rad/s Then the angular acceleration is given by w = w +(t t) r i f i = (w rw)/(tit)f i = (60 rad/s0 rad/s)/(4.0 s) 2 = 15 rad/s Then the net torque applied by motor is = I = (0.001 kg/m )(15 rad/s ) 2 = 0.04686 N/m~0.047 N/m

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##### ISBN: 9780130606204

Physics: Principles with Applications was written by and is associated to the ISBN: 9780130606204. Since the solution to 35P from 5 chapter was answered, more than 362 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Physics: Principles with Applications, edition: 6. The full step-by-step solution to problem: 35P from chapter: 5 was answered by , our top Physics solution expert on 03/03/17, 03:53PM. The answer to “What is the distance from the Earth’s center to a point outside the Earth where the gravitational acceleration due to the Earth is of its value at the Earth’s surface?” is broken down into a number of easy to follow steps, and 30 words. This full solution covers the following key subjects: disk, motor, must, axle, electric. This expansive textbook survival guide covers 35 chapters, and 3914 solutions.

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What is the distance from the Earth’s center to a point