# Homework Help: Determine Average Velocity

1. Mar 5, 2006

### markow202

Hi everyone,

Im doing a Math Dynamics course as an independant study and alot I have to teach myself. One problem im stuck on I dont seem to know how to start it or which formula to use. The book has all the formulas but I dont know how to start...

"A particle travels along a straight line such that in 2 s it moves from an initial position Sa = +0.5m to a position Sb = -1.5m. Then in another 4 s it moves from Sb to Sc = +2.5m. Determine the particle's average velocity and average speed during the 6-s time interval."

2. Mar 5, 2006

### physicsprasanna

For Average velocity

Find the final displacement of the particle from the initial position. Then divide this by the total time taken.

For average speed

Find the total distance travelled by the particle. Divide this by the total time taken.

3. Mar 6, 2006

### sporkstorms

One of the main points physicsprasanna is implicitly making, is that velocity takes into account the direction.
Speed does not.

4. Mar 6, 2006

### markow202

Ok thanks I'll try to work that out.

If any more comments feel free.