Answer 7_1_8
Find the angular velocity at the start:
w1 = 2 x p x (750 ÷ 60) = 25p = 78.5 rad/s
Angular acceleration a = 78.5 rad/s ÷ 3s = 26.2 rad/s2
Now use the formula:
q =w1t + 1/2at2
q = 78.5 rad/s x 3s + 1/2 x 26.2 rad/s2 x (3s)2
q = 235.5 rad + 117.9 rad = 353.4 rad