A mass 'm' placed on a frictionless horizontal table and attached to a string passing through a small hole in the surface. Initially, the mass moves in a circle of radius r0 with a speed v0 and the free end of the string, is held by a person. The person pulls on the string slowly to decrease the radius of the circle to 'r'. Find the tension in the string when the mass moves along the circle?

A mass 'm' placed on a frictionless horizontal table and attached to a

1.	A mass 'm' placed on a frictionless horizontal table and attached to a string passing through a small hole in the surface. Initially, the mass moves in a circle of radius r0 with a speed v0 and the free end of the string, is held by a person. The person pulls on the string slowly to decrease the radius of the circle to 'r'. Find the tension in the string when the mass moves along the circle?
Answer» A mass 'm' placed on a frictionless horizontal table and attached to a string passing through a small hole in the surface. Initially, the mass moves in a circle of radius $r_{0}$ with a speed $v_{0}$ and the free end of the string, is held by a person. The person pulls on the string slowly to decrease the radius of the circle to 'r'. Find the tension in the string when the mass moves along the circle?