- #1

- 5

- 0

This is an investigation I have been studying recently, can someone help with the following...

1. Homework Statement

Method:

1. Homework Statement

Method:

1. Place a toy car at the top of a ramp.

2. Let it go.

3. Measure the distance it travels from the bottom of the ramp.

4. Add a 100 g mass to the car and repeat.

5. Repeat with additional masses attached.

I expect the car with more mass to travel further. However, the results show very little variation

## Homework Equations

This is what I have been thinking...

GPE = KE

Therefore, the masses cancel, therefore each of the cars have the same velocity at the end of the ramp.

The car with the most mass has the most KE. Therefore , more Work is needed to change the cars velocity to zero. Therefore, the car with the most mass should travel the furthest before stopping.

## The Attempt at a Solution

[/B]

I was thinking, the normal force is equal to the car's weight. When the car's weight increases, the normal force increases. The normal force is the force that is doing the work to stop the car. Since the normal force increases when the weight increases, enough work is done to slow the car down.

Equation:

ma = µR

ma = µmg

However, I understand this would only apply to a block sliding down a ramp, not a car with rotating wheels.

Do my results make sense? Should the mass cause the distance traveled by the car to increase?

Thanks in advance for your assistance.