Answer 7_1_10

Find the angular velocity at the start:

w1 = 2 x p x (750 ÷ 60) = 25p = 78.5 rad/s

Find the angular velocity and the end:

w2 = 2 x p x (1500 ÷ 60) = 50p = 157 rad/s

Now use the formula:

q =(w1 + w2)t/2

q  = (78.5 rad/s + 157) x 3s = 353 rad

                   2

The same answer to question 8.  I would have been worried if it weren't.

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