# How Do You Convert Newtons to Watts for a Maglev Train Acceleration?

• Jon Winter
In summary: So, in summary, the train car slows down to 5 m/s in 10 seconds due to an "internal" force of 5000 N.
Jon Winter

## Homework Statement

Imagine a maglev train car on a track. The train car weighs 1000 kilograms and travels at 10 meters per second. Without any external force, the train car slows down to 5 meters per second in 10 seconds. How much force does it take to return the train car to traveling at 10 meters per second? Convert that force to watts.

F=MA
A = (vf -vi)/t
W = (N*m)/s

## The Attempt at a Solution

· F = M*A

· F = (1,000 kg)*((10 m/s – 5 m/s)/10 s)

· F = 5,000 kgm/s^2

· F = 5,000 Newtons

· Watt = (N*m)/s

· W = (5,000N * 5m)/10s

· W = 2,500
[/B]

Jon Winter said:
Without any external force, the train car slows down to 5 meters per second in 10 seconds
Okay, so there must be some kind of "internal" force that makes this happen. Just an observation-- this information is irrelevant to the problem.

How much force does it take to return the train car to traveling at 10 meters per second?
Are you sure you have transcribed the original question completely? Clearly an element of time is needed to determine this.

Jon Winter said:
F = (1,000 kg)*((10 m/s – 5 m/s)/10 s)
You seem to have assumed the force is applied for 10s. That is not mentioned in your problem statement. Did you leave it out?
Jon Winter said:
W = (5,000N * 5m)/10s
Where does the distance of 5m come from?

Someone needs to point out that force and power are different physical quantities and that you cannot convert one to the other. What you can do is compute the work a particular force does or the power it is putting into a system. As others have noted, the problem statement is missing information to do that.

Furthermore, a system on which no external force acts does not accelerate by definition.

Merlin3189
Orodruin said:
Furthermore, a system on which no external force acts does not accelerate by definition.
Apologies for my poor choice of words: "internal force".

What seems to be missing is the implication that the train speeds back to 10 m/s in 10 sec.
Work (J) = Change in KE = Force * Distance
Power (Watts) = Work / time

## What is the formula for converting Newtons to Watts?

The formula for converting Newtons (N) to Watts (W) is:W = N * m/s

## What is the difference between Newtons and Watts?

Newtons and Watts are both units of measurement, but they measure different quantities. Newtons measure force, while Watts measure power.

## How do I convert a given amount of Newtons to Watts?

To convert a given amount of Newtons to Watts, you need to know the distance over which the force is applied. You can then use the formula W = N * m/s to calculate the equivalent amount of Watts.

## Can you provide an example of converting Newtons to Watts?

Sure, let's say you have a force of 50 N being applied over a distance of 10 meters. To convert this to Watts, you would use the formula W = 50 N * 10 m/s, which gives you an answer of 500 Watts.

## Why is it important to convert Newtons to Watts?

Converting Newtons to Watts allows you to understand the amount of power being generated by a force. This can be useful in various scientific and engineering applications, such as calculating the power output of a machine or the strength of a person's muscles.

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