A uniform disk with mass 38.7 kg and radius 0.240 m is pivoted at its center about a horizontal, frictionless axle that is stationary. The disk is initially at rest, and then a constant force 30.0 N is applied tangent to the rim of the disk. What is the magnitude v of the tangential velocity of a point on the rim of the disk after the disk has turned through 0.320 revolution?

Explanation:

Given:

Moment of inertia of the given disk:

Also the torque due to the force is given as:

Torque in terms of angular acceleration:

where:

angular acceleration

Now using the equation of motion:

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

the area between the graph and the t axis