A solid body rotates about a stationary axis according to the law θ = k1 t – k2 t^2 , where k1 = 6 rad k2 = 2 rad s-2. Over the time interval between t = 0 and the time, when the body comes to rest,

Q: A solid body rotates about a stationary axis according to the law θ = k1 t – k2 t2 , where k1 = 6 rad k2 = 2 rad s-2. Over the time interval between t = 0 and the time, when the body comes to rest,

(a) the man value of angular velocity is 3 rad/s

(b) the man value of angular velocity is 5.2 rad/s

(c) the mean value of angular acceleration is – 4 rads-2

(d) the man value of angular acceleration is  – 4.9 rads-2

Ans: (a) , (c)