A 2-kg object attached to a horizontal string moves with a speed of 2.5 m/s in a

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A 2-kg object attached to a horizontal string moves with a speed of 2.5 m/s in a circle of radius 3 m on a frictionless horizontal surface.

(a) Find the tension in the string.

(b) List the forces acting on the object, and find the work done by each force during one revolution.

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