An object is moving around a circle with a radius of 0.6 m. The object starts from rest and then experiences a constant angular acceleration. If the tangential velocity of the object increases from 2 m/s to 5 m/s over 10 s, what is the magnitude of the angular acceleration (in rad/s2)?

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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