What is the advantage of a first-class lever? O A. multiplying the effect of the effort force B. increasing the displacement and velocity of the distal end of the lever C. a first-class lever reduces pressure D. A or B is correct, depending on the location of forces relative to the pivot point.

What is the advantage of a first-class lever? O A. multiplying the effect of the effort force B. increasing the displacement and velocity of the distal end of the lever C. a first-class lever reduces pressure D. A or B is correct, depending on the location of forces relative to the pivot point.

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter10: Work, Energy And Machines

Section10.2: Machines

Problem 28PP

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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

Q13

What is the advantage of a first-class lever?
O A. multiplying the effect of the effort force
B. increasing the displacement and velocity of the distal end of the lever
C. a first-class lever reduces pressure
O D. A or B is correct, depending on the location of forces relative to the pivot point.

Expert Solution

Step 1

first-class lever:

The first-class lever is a type of lever where the fulcrum is located between the load (resistance) and the effort (force). This type of lever has the potential to provide a mechanical advantage, meaning the effort force can be less than the load force. An example of a first-class lever is a seesaw. The fulcrum acts as the pivot point, the weight at one end of the seesaw is the load and the effort is applied at the other end. When the effort force is greater than the load force, the lever provides a mechanical advantage, allowing the load to be lifted with less effort.

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