What force does the dynamometer display?

In summary, the textbook answer is 25N because the two people pulling on the dynamometer each have a force of 25N, resulting in a total force of 50N being displayed on the dynamometer. This is due to Newton's third law of motion, where for every action, there is an equal and opposite reaction. Without the other person pulling back, the dynamometer would only display a force of 25N towards the person pulling it.
  • #1
Kamataat
137
0
Hi! Really simple question:

Two people are pulling on the ends of a dynamometer, each with a force of 25N. What force does the dynamometer display?

Textbook answer: 25N

I'm having a difficult time understanding this conceptually. Could anybody explain why the answer is 25N?

Thanks,
Kamataat
 
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  • #2
If the other person wasn't pulling back, the dynomometer, would simply move towards the one person pulling it. It would therefore record zero.
Having another person pulling back, is exactly the same as having one end secured to a wall/floor. Perhaps you can understand that idea better.

This is a question about understanding Newton's third Law of Motion. Do you know that?
 
  • #3
Yes, it's clear now. Thanks!
 

Related to What force does the dynamometer display?

1. What is a dynamometer?

A dynamometer is a device that measures force, torque, or power. It is commonly used in scientific experiments, industrial settings, and automotive testing.

2. What force does the dynamometer display?

The force displayed by a dynamometer depends on the specific type and design of the device. Some dynamometers measure compressive force, while others measure tensile force. It is important to read the specifications of a specific dynamometer to determine what force it displays.

3. How does a dynamometer work?

A dynamometer typically consists of a spring, load cell, or strain gauge that measures the amount of force applied to it. This force is then converted into an electrical signal which is displayed on a digital or analog scale.

4. What units does a dynamometer measure force in?

Dynamometers can measure force in a variety of units, including pounds (lbs), kilograms (kg), Newtons (N), and kilonewtons (kN). Some dynamometers may also have the ability to display force in other units such as ounces or tons.

5. Can a dynamometer measure other types of force besides mechanical force?

Yes, some types of dynamometers, such as a piezoelectric dynamometer, can measure other types of force such as electrical and thermal force. However, most dynamometers are specifically designed to measure mechanical force.

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