Question

A machine shop grinding wheel accelerates from rest with a constant angular acceleration of 2.5 rad/s^2 for 7.1s and is then brought to rest with a constant angular acceleration of -4.1rad/s^2

Answer 1

what is the total elapsed time?

Answer 2

\[\omega = \alpha t \]

where alpha = 2.5 and t = 7.1
find omega.
use in:
\[-\omega = -4.1t \]
find t
total time is 7.1 seconds + t

Answer 3

@Fellowroot why do you take a root to find t?

Answer 4

the equation doesn't contain t^2