net torque and acceleration
70 cm diameter cylindrical disk has a mass of 10 kg and accelerates uniformly from 150 rpm to 300 rpm in 4 sec. a) find angular accleration. b) what are th radial and tangential components of linear accleration for a point on the edge of the wheel. C) what is th net torque acting on the wheel.
I found the part a and part c. In part a, which is a=w/t= 15.7rad/s /4 sec=3.93 rad/s^2
for C, I have T=1/2 MR^2 * 3.93 = 2.4NM
but I stock on next b problems. can any one help me out?
finding radial and tangential acceleration, radial is centrepedal, right? which is a_c=v^2/r, and a_tan=v/t.. I plug in the numbers, but I don't get the right answer.
