A Pulley has mass M=4 kg and radius R=0.4 m. Assume that it is a uniform solid disk so that its moment of inertia is I= .5MR^2. A massless cord is wrapped around it and a tension force Ft is applied. The pulley starts from rest. After the tension force has been applied for 6 seconds, the angular speed has reached T=60 rads/s.
a.) What is the pulley's angular acceleration?
b.) What is the linear (tangential) acceleration of a point on the rim of the pulley?
The Attempt at a Solution
V= .418 m/s
angular acceleration= w2-w1/t2-t1
= .15 rads/s^2
b.) Tangential acceleration= r*alpha
Can anyone please tell me if this is correct?? Thank you thank you!