10.3 Exercise 2

A piece of wood can be carved by spinning it on a motorized lathe and holding a sharp chisel to the edge of the wood as it spins. How does the angular velocity of a piece of wood with a radius of 0.2 m spinning on a lathe change when a chisel is held to the wood's edge with a force of 50 N?

1. It increases by 10 N•m multiplied by the moment of inertia of the wood.
2. It decreases by 10 N•m divided by the moment of inertia of the wood-and-lathe system.
3. It decreases by 10 N•m multiplied by the moment of inertia of the wood.
4. It decreases by 10 m/s².