# Homework Help: Quick Physics Question (Urgent)

1. Aug 27, 2007

### sun.shine_willy

1. The problem statement, all variables and given/known data

It is possible for a particle to accelerate without changing its speed.

True or False?

2. Relevant equations

I don't think there is any except average acceleration equation

3. The attempt at a solution

I am thinking False because Acceleration depends on velocity vector

2. Aug 27, 2007

### JFonseka

Think of uniform circular motion

3. Aug 27, 2007

### sun.shine_willy

lol i am lost, wats uniform circular motion?

4. Aug 27, 2007

### JFonseka

An example...

A car going around a circular track at the same velocity.

5. Aug 27, 2007

### sun.shine_willy

oh i get it, so if the car goes in a circle, it accelerates but it doesn't actually increase its speed right?

6. Aug 27, 2007

### JFonseka

Yes that's right, because the car's direction is always at a tangent to the circle, hence it accelerates at a tangent, but due to the centripetal force, it stays in a circular motion

7. Aug 27, 2007

### sun.shine_willy

thankyou

JFonseka

8. Aug 27, 2007

### JFonseka

No problem

9. Aug 27, 2007

### Gokul43201

Staff Emeritus
Just to clear up any possible misinterpretation, I believe Fonseka meant to write: A car going around a circular track at the same speed.

It is not possible to go around a circular track at constant velocity.

10. Aug 27, 2007

### JFonseka

Yep, can't believe I said velocity there :O 100 push ups

11. Aug 27, 2007

### rocomath

lol, it would be hilarious if a teacher did that infront of a classroom for saying the wrong thing