# Particle motion

• December 18th 2008, 04:19 PM
elpermic
Particle motion
$-(t+1)(sint^2/2)$ is the velocity Intervals [0,3]

Acceleration at 2?
When is it farthest to the left? Why?
When does it change direction? Why?
What is the total distance traveled from 0 to 3?

This is on my math test today, nad I was wondering if I got it right..

I got..

-1.586
-2.5066283 because velocity>0
-2.5066283 because it goes from - to +
-I got 2.197

Was I right? Wrong?
• December 18th 2008, 11:36 PM
mr fantastic
Quote:

Originally Posted by elpermic
$-(t+1)(sint^2/2)$ is the velocity Intervals [0,3]

Acceleration at 2?
When is it farthest to the left? Why?
When does it change direction? Why?
What is the total distance traveled from 0 to 3?

This is on my math test today, nad I was wondering if I got it right..

I got..

-1.586 Mr F says: +1.586.
-2.5066283 because velocity>0 Mr F says: t = +2.5066 (because v = 0).
-2.5066283 because it goes from - to + Mr F says: t = +2.5066.
-I got 2.197 Mr F says: d = distance travelled left + distance travelled right = 3.2655 + 1.0683 = ....

Was I right? Wrong?

No good can ever come from doing a post mortem on a test.