Physics Laboratory Experiments
Physics Laboratory Experiments
8th Edition
ISBN: 9781285738567
Author: Jerry D. Wilson, Cecilia A. Hernández-Hall
Publisher: Cengage Learning
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Question
Chapter 15, Problem 1EP
To determine

The input and output distances for a simple machine.

Expert Solution & Answer
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Answer to Problem 1EP

The input distance is greater than the output distancefor the given simple machine.

Explanation of Solution

The device which can alter the direction as well as the amount of an applied force to it for a process, is termed as a simple machine. Therefore, a simple machines are those physical devices used for apply force when the direction or the magnitude of the applied force and its distance is changed.

 The amount of work done by a simple machine is defined as the force applied to the displacement of the object or the parallel distance at which the force is applied. In other words, the work done by the machine is the product of the force applied and the distance to which force is applied.

Write the expression for the work done by the machine.

  W=Fd        (I)

Here, W is the work done, F is the force applied and d is the distance at which the force is applied on the machine.

Write the expression for the conservation of energy or work the machine.

  Wi=Wo

Here, Wi is the work input and  Wo is the work output of the machine.

Substitute Fidi for  and Fodo for  from equation (I) in the above expression.

  Fidi=Fodo

Here, Fi and Fo are the input and the output forces on the machine and di and do are the input and the output distances of the machine.

Simplify the above expression as:

  FoFi=dido

Therefore, it is clear from the above expression that when output force is greater than the input force will make the input distance greater than the output distance for the machine.

Conclusion:

Thus, The input distance is greater than the output distance for the given simple machine.

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