Answer to Question #274964 in Physics for Dhea

Question

A fly wheel of radius 2.28 cm is accelerated from rest at 14.2 rad/s square until its rotational speed is 276 rpm. What is the tangential acceleration of a point on the rim of the flywheel during its spin up process. What is the radial acceleration of this point when the flywheels is spinning at full speed?

Answer 1

Tangential acceleration:

$$a_\tau=\alpha r=32.4\text{ cm/s}^2.$$

The radial acceleration:

$$a_r=\omega^2r=1905\text{ cm/s}^2.$$