Home
Class 12
PHYSICS
A small mass attached to a string rotate...

A small mass attached to a string rotates on a frictionless table top as shown. 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

A

Increase by a factor of 4

B

Decrease by a factor of 2

C

Remain constant

D

Increase by a factor of 2

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

Speed of transverse wave on string is v . If tension is increased by factor of 4 and radius of the string is increased by factor of 2, then the new wave speed will be :

Speed of transverse wave on string is v . If tension is increased by factor of 4 and radius of the string is increased by factor of 2, then the new wave speed will be :

A mass is tied to a, string 1 m long and rotated in a horizontal circle at the rate of 600 rpm. If the tension inthe string is 3943.8 N, calculate the mass.

A mass m moves in a circles on a smooth horizontal plane with velocity v_(0) at a radius R_(0) . The mass is attached to string which passes through a smooth hole in the plane as shown. The tension in string is increased gradually and finally m moves in a circle of radius (R_(0))/(2) . the final value of the kinetic energy is

A mass m moves in a circles on a smooth horizontal plane with velocity v_(0) at a radius R_(0) . The mass is atteched to string which passes through a smooth hole in the plane as shown. The tension in string is increased gradually and finally m moves in a cricle of radius (R_(0))/(2) . the final value of the kinetic energy is

A uniform sphere of weight W and radius 3 m is being held by a frictionless wall as shown in the figure. The tension in the string will be (length of the string is 2m):

A mass M is hung with a light inextensible string as shown in Find the tension in the horizontal part of the string .

A small stone of mass 50 g is rotated in a vertical circle of radius 40 cm. What is the minimum tension in the string at the lowest point?

Calculate the tension in the string shown in figure. The pulley and the string are light and all surfaces are frictionless. Take g=10 m/ s^2 .

Figure shows a mass m placed on a frictionless horizontal table and attached toa string passing through a mall hole in the surface. Initially, themas movesin a circle of radius r_0 with a speed v_0 and the ree end of the string is held by a person. The person pulls on the string slowly to decrease the radius of th circle of r. a. Find the tension in the string when the mass moves in the circle of radius r. b. Calculate the chasnge in the kinetic energy of the mass