A puck of mass `m` is moving in a circle at constant speed on a frictionless table as shown in the figure . The puck is connected by a string to a suspended bob, also of mass `m`, which is at rest below the table. Half of the length of the string is above the tabletop and half below. What is the magnitude of the centripetal acceleration of the moving puck ? Let `g` be the acceleration due to gravity.

Options

A. The magnitude of the centripetal acceleration of the moving puck is less than `g`.
B. The magnitude of the centripetal acceleration of the moving puck is equal to `g`.
C. The magnitude of the centripetal acceleration of the moving puck is greater than `g`.
D. There is not enough information given to determine how the magnitude of the centripetal acceleration of the moving puck compares to `g`

Answer

B

Explanation

T=mg and `T=(mv^(2))/(r)`