# Relay Race

1. Aug 31, 2004

### Whatupdoc

In a relay race, each contestant runs a distance 24.8m while carrying an egg balanced on a spoon, turns around, and comes back to the starting point. Edith runs the first distance 24.8m in a time t1=19.3s . On the return trip she is more confident and takes only t2=time 15.1s .

What is her average velocity for the entire round trip?

ok this question seems so easy, but i cannot get the right answer, which is really bugging me.

(24.8+24.8)m/(19.3/15.1)s = 1.44m/s

can someone help?

2. Aug 31, 2004

### Gokul43201

Staff Emeritus
Why do you think that's wrong ? It looks fine to me...

3. Aug 31, 2004

### Whatupdoc

it's wrong...well for our college, we submit our answers to an automated sort of server and it checks your answer.

Last edited: Aug 31, 2004
4. Aug 31, 2004

### suffian

this is a trick question. the average velocity is the displacement over the time. the displacement is zero because she is back where she started. i think you should protest.