1A 0.2 kg metal ball is tied to a string 0.6 m long. The bal makes 20 revolutions in 60 sec. Calculate the a) Velocity b)centripetal acceleration c) the centripetal force to keep it moving in a circular motion

what are the statements? x

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

i think the answer is a, hope this : )

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