A small block of mass 4 kg is attached to a cord passing through a hole in a horizontal frictionless syurface . The block is originally revolving in a circle of radius 0.5 m about the hole , with a tangential velocity of 4 m/s . The cord is then pulled slowly from below , shortening the radius of the circle in which the block revolves . The breaking strength of the cord is 600 N . What will be the radius of the circle when the cord breaks ?

Explanation

To solve the problem, we need to find the radius of the circle when the cord breaks. We start with the information given:

- Mass of the block (m) = 4 kg
- Initial radius (R1) = 0.5 m
- Initial tangential velocity (V1) = 4 m/s
- Breaking strength of the cord (T_max) = 600 N

### Step 1: Understand the relationship between angular momentum and radius
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