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MCQ
A ball is whirled on a string. If both the mass of the ball and its speed are doubled keeping the radius constant, the tension in the string becomes:
Unit-4 Dynamics-2
A Eight times
B Two times
C Four times
D Sixteen times
Explanation

F is proportional to m v^2, so doubling both mass and speed multiplies the force by 2 x 4 = 8.

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