Calculating Net Torque for Rotational Motion with Multiple Forces

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However, assuming that the first force is in the opposite direction as the second force, the net torque would be 2 N*m in the clockwise direction. In summary, a solid cylinder of mass 10 kg is being pivoted around a frictionless axis through its center. Two ropes, with forces of 5.0 N and 6.0 N, are wrapped around different sections of the cylinder. The net torque on the cylinder is 2 N*m in the clockwise direction.
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Homework Statement



A solid cylinder of mass 10 kg is pivoted about a frictionless axis through the center O. A rope wrapped around the outer radius R1 = 1.0 m, exerts a force F1 = 5.0 N to the right. A second rope wrapped around another section of radius R2 = 0.50 m exerts a force F2 = 6.0 N downward. How many radians does the cylinder rotate through in the first 5.0 seconds, if it starts from rest?

Homework Equations


The Attempt at a Solution



I did find the torque for each force, with the counterclockwise force being positive.

so

T(1) = (1.0 m)(5m) = 5 N*m
T(2) = (0.5 m)(6.0 N) = 3 N*m

so I figured out that the net torque would be 2 N*m in the clockwise direction.

But i don't know what to do with this.

Thank you so much!
 
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  • #2
The problem as stated doesn't indicate in which direction (clockwise or counter-clockwise) either force will tend to make the cylinder rotate.
 

Related to Calculating Net Torque for Rotational Motion with Multiple Forces

What is circular/rotational dynamics?

Circular/rotational dynamics is a branch of physics that deals with the motion of objects in circular or rotational motion. It involves the study of forces, torque, and motion in circular or rotational systems.

What is the difference between linear and circular/rotational motion?

In linear motion, an object moves along a straight line, while in circular/rotational motion, an object moves along a curved path. Linear motion involves translational motion, while circular/rotational motion involves rotational motion around an axis.

What is angular velocity?

Angular velocity is a measure of how fast an object rotates around an axis. It is defined as the change in angular displacement over time and is expressed in radians per second.

What is moment of inertia?

Moment of inertia is a measure of an object's resistance to changes in its rotational motion. It depends on an object's mass, shape, and distribution of mass around its axis of rotation.

What is torque and how is it related to circular/rotational dynamics?

Torque is a measure of the rotational force acting on an object. It is equal to the product of force and the perpendicular distance from the axis of rotation. In circular/rotational dynamics, torque is responsible for causing angular acceleration and changing an object's rotational motion.

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