Posted by Samantha on .
At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns through an angle of 440 rad as it coasts to a stop at constant angular deceleration.
Through what total angle did the wheel turn between t=0 and the time it stopped? At what time does the wheel stop? What was the wheel's angular acceleration as it slowed down?
For the total angle I got 505 rads and that's wrong. I did 26x2.5 and then added 440 but it's wrong.
For the 2nd question I did the angular velocity divided by angular acceleration and got 1.04 and added it to 2.5 but that answer is wrong, too. I have no idea how to solve this problem at all.

Physics Really Need Help Please 
Samantha,
I found 583 for the first one which is right. I have no idea how to do the 2nd and 3d question please help!

Physics Really Need Help Please 
Hanie,
hi do you still need help? lol i'm in kaminskys class too

Physics Really Need Help Please 
Mallory,
Is anyone going to answer this?? :[[

Physics Really Need Help Please 
You're Welcome,
total time=d(vv0)/2