Question

A disk with mass m = 10.3 kg and radius R = 0.34 m begins at rest and accelerates uniformly for t = 16.8 s, to a final angular speed of ω = 26 rad/s.

1)

What is the angular acceleration of the disk?

rad/s²

2)

What is the angular displacement over the 16.8 s?

rad

3)

What is the moment of inertia of the disk?

kg-m²

4)

What is the change in rotational energy of the disk?

J

5)

What is the tangential component of the acceleration of a point on the rim of the disk when the disk has accelerated to half its final angular speed?

m/s²

6)

What is the magnitude of the radial component of the acceleration of a point on the rim of the disk when the disk has accelerated to half its final angular speed?

m/s²

7)

What is the final speed of a point on the disk half-way between the center of the disk and the rim?

m/

Answer 1