14. Torque & Rotational Dynamics
Torque on Discs & Pulleys
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- Multiple Choice
The composite disc below is free to rotate about a fixed axis, perpendicular to it and through its center. All forces are 100 N, and all angles are 37°. The dotted lines are either exactly parallel or exactly perpendicular to each other. The inner (darker) and outer (lighter) discs have radii 3 m and 5 m, respectively. Calculate the Net Torque produced on the composite disc, about an axis perpendicular to it and through its center. Use +/– to indicate direction.
793views14rank2comments - Multiple Choice
A square with sides 4 m long is free to rotate around an axis perpendicular to its face and through its center. All forces shown are 100 N and act simultaneously on the square. The angle shown is 30°. Calculate the Net Torque that the forces produce on the square, about its axis of rotation.
1197views7rank3comments - Multiple ChoiceA rope is wrapped around a pulley and two blocks (A and B) are attached to the two ends of the rope, and and . The pulley itself can be modeled as a solid cylinder with radius 4.5 cm, and mass . What is the magnitude of the acceleration of block A?855views
- Multiple ChoiceSuppose a force is applied tangentially to the edge of a solid cylinder of radius and mass . causing an angular acceleration . If the same force is applied tangentially to a solid sphere also of radius and mass . what will be the angular acceleration?648views1rank