Answer 7_1_9

Find the angular velocity at the start:

w1 = 2 x p x (30000 ÷ 60) = 1000p = 3142 rad/s

Angular displacement q = 2/3 x p = 2.09 rad

Now use the formula:

0 =w1² + 2aq

0 = (3142 rad/s)²  + 2 x a x 2.09 rad

a = 3142² ÷ -(2 x 2.09) = -2.36 x 10⁶ rad/s²

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