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1. An object of mass 1.2 kg is attached to a string of 0.83 m. When...

1. An object of mass 1.2 kg is attached to a string of 0.83 m. When this object is rotated around a horizontal circle, it completes 15 revolutions in 9.6 seconds.

a. What is the period (T) of this motion?

b. What is the tangential velocity of the object?

c. What is the tension on the string? Hint: The tension on the string is the centripetal force that causes the circular motion.

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Answer #1

Given that the object makes 15 revolutions in 9.6sec

Angular speed ,

Convert revolutions to radians , 1 rev =2 radians

(a)Time Period,

ANSWER:

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(b)Tangential Velocity,

Given

ANSWER:

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(c)Tension in the string

Use the Hint

Tension in the string ,T =Centripetal Force

ANSWER:

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