Question

A 0.15 kg circular grinding wheel of radius 0.076 m rotates counterclockwise at 565 rad/s while operating. You turn the grinder off and firmly but slowly press a block of wood directly onto the wheel so that the wheel steadily slows to halt in 5.0 s.

What is the magnitude of the average torque exerted on the wheel by the block of wood as it steadily slows to a halt? (Note: I_disk = (1/2) M R² .)

Answer 1

Given:

Mass of the grinding wheel,

Radius of the grinding wheel,

Initial angular velocity,

Final angular velocity,

Time,

------------------

First, find the angular acceleration

Use formula

==========================

Consider the grinding wheel

Net Torque = Moment of inertia*Angular acceleration

ANSWER:

===============================