Another simple torque question

Nov 12, 2010

auk411

Homework Statement

here is an image: http://panda.unm.edu/Courses/Price/Phys160/F29-4.jpeg

Homework Equations

The Attempt at a Solution

My pivot point is at the roller. Doesn't that mean that gravity has no torque?

Nov 12, 2010

ehild

Homework Helper

auk411 said:

My pivot point is at the roller. Doesn't that mean that gravity has no torque?

It is only true if h=(L/2) sin(theta)

ehild

1. What is torque?

Torque is a measure of the force that causes an object to rotate around an axis. It is calculated by multiplying the force applied to an object by the distance from the axis of rotation to the point where the force is applied. Torque is typically measured in units of Newton-meters (Nm) or foot-pounds (ft-lb).

2. How is torque different from force?

While both torque and force involve the application of a force to an object, they differ in the direction in which the force is applied. Force is applied in a straight line, while torque is applied in a circular or rotational motion. Additionally, torque takes into account the distance from the axis of rotation, while force does not.

3. What factors affect torque?

There are three main factors that affect torque: the magnitude of the applied force, the distance from the axis of rotation to the point where the force is applied, and the angle at which the force is applied. These three factors are known as the magnitude, distance, and direction components of torque.

4. What are some real-world examples of torque?

Torque is present in many everyday objects and activities. Some examples include opening a jar lid (where the torque is applied by the hand), using a wrench to tighten a bolt (where the torque is applied by the hand on the wrench), or riding a bike (where the torque is applied by the legs on the pedals).

5. How is torque used in engineering and physics?

Torque is an important concept in engineering and physics, particularly in the fields of mechanics and dynamics. It is used to analyze the motion and stability of objects, design machines and structures, and understand the behavior of fluids and gases. For example, torque is used to calculate the power output of an engine, determine the stability of a building, or predict the behavior of a helicopter in flight.