   Chapter 5, Problem 81AP

Chapter
Section
Textbook Problem

A truck travels uphill with constant velocity on a highway with a 7.0° slope. A 50.-kg package sits on the floor of the back of the truck and does not slide, due to a static frictional force. During an interval in which the truck travels 340 m, (a) what is the net work done on the package? What is the work done on the package by (b) the force of gravity, (c) the normal force, and (d) the friction force?

(a)

To determine
The net work done on the package.

Explanation

Given Info:

The slope of the highway is 7.0° .

The mass of the package is 50.0kg .

The distance that the truck is travelled is 340m .

According to Work–Energy theorem, the net work done on the package is equal to the change in kinetic energy

(b)

To determine
The work done on the package by the force of gravity.

(c)

To determine
The work done on the package by the normal force.

(d)

To determine
The work done on the package by the friction force.

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