- #1

- 971

- 40

## Homework Statement

## Homework Equations

## The Attempt at a Solution

The answer to this problem can be obtained by equating ##\frac{1}{2}mv^2 = ΔU## .

But I am not sure why this is to be done . In fact I think this is not quite right .

1) The Kinetic energy ##\frac{1}{2}mv^2## is the energy due to bulk motion whereas ΔU relates the microscopic motion .Can we really equate the two ?

2) Is this an application of 1st law of thermodynamics . I do not think so .

3) Is this a simple energy conservation problem . Again I doubt that is the case .

Any help is appreciated .

Thanks