A small mass attached to a string rotates on a frictionless table top as shown in Fig. If the tension in the string is increased by pulling the string causing the radius of the circular motion to decrease by a factor of 2, the kinetic energy of the mass will - VgyanHub

Question:

4.A small mass attached to a string rotates on a frictionless table top as shown in Fig. If the tension in the string is increased by pulling the string causing the radius of the circular motion to decrease by a factor of 2, the kinetic energy of the mass will

Options :

a) Increase 4 times
b) Decrease 2 times
c) Remain constant
d) Increase 2 times

Answer :

a) Increase 4 times

Answer Steps :

Step1 :-

Step2 :-

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