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## Homework Statement

The roller coaster car shown below has a mass of 800 kg when fully loaded with passengers.

(a) If the car has a speed of 25.0 m/s at point A, what force does the track exert on the car at that

point. (b) If the car has a speed of 10.0 m/s at point B, what force does the track exert on the car.

(c) What is the maximum speed the car could have at B and still remain on the track?

## Homework Equations

F = mv²/r

## The Attempt at a Solution

(a)

I thought I would just need to plug into the above formula but that didn't work. I did:

800kg * (25m/s)² / 10m and got the answer 50000N, but that is not the correct answer. I am not sure what else to

Edit: Figured out I had to add in the normal force and got the correct answer.

(b)

Edit: Figured out based on what I learned from part a.

(c)

Edit: Figured out based on what I learned from part a.

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