   Chapter 5, Problem 72AP

Chapter
Section
Textbook Problem

The particle described in Problem 71 (Fig. P5.71) is released from point A at rest. Its speed at B is 1.50 m/s. (a) What is its kinetic energy at B? (b) How much mechanical energy is lost as a result of friction as the particle goes from A to B? (c) Is it possible to determine μ from these results in a simple manner? Explain.

(a)

To determine
The kinetic energy of the particle at B.

Explanation

Given Info:

The mass of the particle is 2.0×102g .

The speed of the particle at B is 1.50m/s .

Formula to calculate the kinetic energy of the particle at B is,

KEB=12mvB2

• vB is the speed of the particle at B
• m is the mass of the particle

Substitute 2.0×102g for m and 1

(b)

To determine
The total mechanical energy lose when the particle goes from A to B.

(c)

To determine
Whether it is possible to find μ form above results in a simple manner.

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