A 250 g , 25-cm diameter plastic disk is spun



Answered question


A 250 g , 25-cm diameter plastic disk is spun on an axle through its center by an electric motor. What torque must the motor supply to take the disk from 0 to 1900 rpm in 4.7 s ? Express your answer in newton-meters.

Answer & Explanation

Jonathan Burroughs

Jonathan Burroughs

Beginner2022-01-01Added 37 answers

Mass of the disc, m = 250 g = 0.25 kg
Diameter of the disc, d = 25 cm = 0.25 m
Disc rotate from 0 to 1900 rmp, in t = 4.7 sec.
Moment of inertia of the disc
I=0.00195 kgm2
=0.002 kgm2
angular frequency, ω=2π(190060)
ω=198.96 rads
α=ωt=198.964.7=42.33 rads2
The torque is
=0.0825 Nm

Do you have a similar question?

Recalculate according to your conditions!

Ask your question.
Get an expert answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?