A uniform disk with a mass of 35.5 kg and a radius of 0.424 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk, as the drawing indicates.
(a) What is the net torque produced by the two forces?
(b) What is the angular acceleration of the disk?
2007-10-22 07:46:17 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
First, you need to compute the moment of inertia of the disk using I = ½mr².
Then you need to compute the torques represented by the forces using τ = f*r*cosθ where θ is measured between the angle of the force and the radius at the point where the force is applied, and r is measured as the length of the radius to the point where the force is applied.
Sum the two torques to get a net torque, and then compute the angular acceleration using
τ = Iα (the rotational analog to F = ma).
Good luck with your homework.
2007-10-22 09:47:15 · answer #1 · answered by dansinger61 6 · 0⤊ 0⤋
Being a person that plays disc golf regularly I am going to say A I believe that the 90.0N and the 125N would be similar to the resistance from wind and atmosphere. But who knows I could be wrong.
2007-10-22 15:10:51 · answer #2 · answered by Anonymous · 1⤊ 1⤋
You need to describe or show that "drawing".
2007-10-22 16:38:49 · answer #3 · answered by sojsail 7 · 0⤊ 0⤋