A 0.58- kg flashlight is swung at the end of a string in a horizontal circle of 0.85- m radius with a constant angular speed. If no torque is applied, what must the radius become if the angular speed of the flashlight is to be halved?

Question

A 0.58- kg flashlight is  swung at the end of a string in a horizontal circle of 0.85- m radius  with a constant angular speed. If  no torque is applied, what must the  radius become if the angular speed of  the flashlight is to  be halved?

bobpursley · Answer

Assuming conservation of momentum mr^2*w=m(R)^2* w/2 Find R in terms of r