6. Add the three torques, but as I see it, trorque 3 is in the clockwise direction, so it should subtract from the sum of the other two. sketch out that to confirm.
7. A= net torque/I
8. net torque*time=(momentinertia) *angularvelocityfinal
solve for final angular velociyt, so rotational energy=1/2 (momentinertia) wf^2
A uniform disk with mass m = 9.42 kg and radius R = 1.31 m lies in the x-y plane and centered at the origin. Three forces act in the +y-direction on the disk: 1) a force 315 N at the edge of the disk on the +x-axis, 2) a force 315 N at the edge of the disk on the –y-axis, and 3) a force 315 N acts at the edge of the disk at an angle θ = 35° above the –x-axis.
√ 1) What is the magnitude of the torque on the disk about the z axis due to F1?
412.65 N-m √
√ 2) What is the magnitude of the torque on the disk about the z axis due to F2?
0 N-m √
√ 3) What is the magnitude of the torque on the disk about the z axis due to F3?
338N-m √
√ 4) What is the x-component of the net torque about the z axis on the disk?
0 N-m √
√ 5) What is the y-component of the net torque about the z axis on the disk?
0 N-m √
# HELP IN 6,7 & 8 PLEASE!!
6) What is the z-component of the net torque about the z axis on the disk?
N-m
7) What is the magnitude of the angular acceleration about the z axis of the disk?
rad/s2
8) If the disk starts from rest, what is the rotational energy of the disk after the forces have been applied for t = 1.7 s?
J
1 answer
1 answer