Part 1: A grinding wheel, initially at rest, is ro- tated with constant angular acceleration of 7.65 rad/s for 7.3 s. The wheel is then brought to rest with uniform deceleration in 5.41 rev. Find the angular acceleration required to bring the wheel to rest. Note that an in- crease in angular velocity is consistent with a positive angular acceleration. Answer in units of rad/s2.Part 2: Determine the time needed to bring the wheel to rest. Answer in units of s.

part 1 of 2 A grinding wheel, initially at rest, is ro- tated with constant angular acceleration of 7.65 rad/s' for 7.3 s. The wheel is then brought to rest with uniform deceleration in 5.41 rev. Find the angular acceleration required to bring the wheel to rest. Note that an in- crease in angular velocity is consistent with a positive angular acceleration. Answer in units of rad/s2. part 2 of 2 Determine the time needed to bring the wheel to rest. Answer in units of s