Question

Disk A has a mass of 4 kg and a radius r = 75 mm; it is at rest when it is placed in contact with the belt, which moves at a constant speed v = 18 m/s. Knowing that μk = 0.25 between the disk and the belt, determine the number of revolutions executed by the disk before it reaches a constant angular velocity.

Answer 1

0.00293kg m2 = 0.00281kg m2

Step-by-step explanation:

The calculated moment of inertia doesn't match, suggesting that the disk doesn't reach a constant angular velocity due to the limiting frictional force. Therefore, the number of revolutions executed by the disk before reaching a constant angular velocity cannot be accurately calculated in this case. 0.00293kg m2= 21×4kg×(0.075m) 2