# Torque needed to overcome friction and move object

• tien87

#### tien87

I need to calculate the torque needed to move an object in horizontal direction. The object is subjected to a force P also in horizontal direction. The general situation is as follows: a (hor.) lever is connected to a (vert.) shaft which will provide the torque. The other end of the lever is connected*to the object. Now, my problem lies in understanding the torque needed to move the object for different types of connection between lever and object. There are 3 situations: connection is a hinge* or there is no fixed connection but the lever can slide against the surface of the object with a high* friction coefficient or very low* coefficient. So, apart from the force P applied to the object, the lever also has to overcome the force due to friction with the object surface or the force on the hinge.

Where does the friction of the object occur?

At least for me, the problem is quite unclear.

## 1. What is torque?

Torque is a measure of the force that can cause 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.

## 2. How does friction affect torque?

Friction is a force that opposes motion between two surfaces in contact. In order to overcome friction and move an object, a certain amount of torque is needed to counteract the frictional force.

## 3. What factors affect the amount of torque needed to overcome friction?

The amount of torque needed to overcome friction depends on the coefficient of friction between the two surfaces, the normal force (perpendicular force) acting on the object, and the distance between the axis of rotation and the point where the force is applied.

## 4. How does the weight of an object impact the torque needed to overcome friction?

The weight of an object, or its mass, does not directly impact the torque needed to overcome friction. However, a heavier object may require more force to move, which in turn would require more torque to overcome friction.

## 5. Can the torque needed to overcome friction be reduced?

Yes, the torque needed to overcome friction can be reduced by decreasing the coefficient of friction between the surfaces or by increasing the distance between the axis of rotation and the point where the force is applied. Lubricants can also be used to reduce the frictional force.