|
ID/Type |
Web Link or WA Question Code |
Local download |
Launch from browser |
Description |
|
G11-1 |
Calculating Net
Torque |
torque-disc-02.iwp |
torque-disc-02.iwp |
The green disc is free to rotate about at axle located at its center. Two forces represented by the red vectors act on the disc at positions indicated by the blue vectors. If the net torque on the disc is non-zero, the disc will undergo angular acceleration about the axle. A positive angular acceleration results in counterclockwise rotation from rest. |
|
G11-2 |
Guide to
Solving Static Equilibrium Problems |
equi-torques-03.iwp |
equi-torques-03.iwp |
A massless rod is held vertical by a string attached to the floor and an applied force acting to the right at the center of the rod. The bottom of the rod is fixed to the floor by a frictionless axle. The red lines are the moment arms of the tension and applied forces about the axis. Since the axis is chosen to be the point at which Fh and Fv act, those forces exert no torque about the axis. Thus, only tension and the applied force play a part in the net torque equation. Step through the applet to see the result of changing the magnitude of the applied force.
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|
P15 |
A Problem in
Calculating Net Torque |
torque-disc-01.iwp |
torque-disc-01.iwp |
The green disc is free to rotate about at axle
located at its center. Three forces represented by the red vectors act on the
disc at positions indicated by the blue vectors. If the net torque on the disc
is non-zero, the disc will undergo angular acceleration about the axle. A
positive angular acceleration results in counterclockwise rotation from rest.
This convention is used for the sign of the angle between the force and the
position vector: A positive angle indicates that the thumb points out of the
screen when the fingers of right hand are curled from the position vector into
the force vector. A negative angle indicates that the thumb points into the
screen. See the inset for the angle between Ra and Fa.
Position vectors are indicated by Ra, Rb, and Rc.
Forces are indicated by Fa, Fb, and Fc. |