You are Here: Home >< Physics

# Physics q in my textbook Watch

1. it takes 2000 j of energy to increase the temperature of the brake disc on each wheel by 1 degree C. if the car has a mass of 1 tonne and slows from 20m/s to 15 m/s how much will the disc's temperature rise?
2. (Original post by bilesbilinski)
it takes 2000 j of energy to increase the temperature of the brake disc on each wheel by 1 degree C. if the car has a mass of 1 tonne and slows from 20m/s to 15 m/s how much will the disc's temperature rise?
Popped this in the Physics thread for you
3. (Original post by bilesbilinski)
it takes 2000 j of energy to increase the temperature of the brake disc on each wheel by 1 degree C. if the car has a mass of 1 tonne and slows from 20m/s to 15 m/s how much will the disc's temperature rise?
What is the change in the car's kinetic energy as it slows from 20m/s to 15m/s? Remember, KE = 1/2mv^2.

You can then work out how much the temperature of the brake discs will rise. For example, if the car's KE changed by 8000J, then that would be 2000J per brake disc and therefore each disc's temperature will rise by 1 degree C.

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: June 3, 2016
Today on TSR

### Medicine offers rolling in

Which unis have sent theirs?

### I refused to be served by tattooed cashier

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.