# How Can Net Force Be Zero When Net Torque Isn't, and Vice Versa?

• parwana
In summary, an example of when the net force on an object is zero but the net torque is nonzero is when two parallel forces with equal magnitudes and opposite directions form a torque. An example of when the net torque on an object is zero but the net force is nonzero is when an object is sliding down an incline and two parallel forces with equal magnitudes and opposite directions (also known as a "couple") are separated by a distance to produce a torque.
parwana
(a) Give an example in which the net force acting on an object is zero and yet the net torque is nonzero.

(b) Give an example in which the net torque acting on an object is zero and yet the net force is nonzero.

can b be torque= Tension(12 N)(radius 0m) ?

(a) any two parallel forces with the same magnitude and opposite directions form a torque, while the net force is obvoiusly zero.

(b) consider an object sliding down an incline.

Last edited:
Remember that two parallel forces with the same magnitude and opposite directions have to be separated by some distance to produce a torque. These are commonly called a 'couple'.

## 1. What is torque?

Torque is the 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 to the point of application of the force.

## 2. How is torque related to force?

Torque is directly proportional to the force applied to an object and the distance from the axis of rotation. This means that increasing either the force or the distance from the axis of rotation will result in an increase in torque.

## 3. Can you give an example of torque and force in everyday life?

One example is opening a door. When you push on a door handle, you are applying a force that causes the door to rotate around its hinges. The distance from the hinges to the point where you push is the lever arm, and the force you apply creates torque that opens the door.

## 4. How does torque affect an object's rotation?

Torque causes an object to rotate around an axis of rotation. The direction of rotation is determined by the direction of the force and the direction of the lever arm. The greater the torque, the faster the object will rotate.

## 5. What are the units used to measure torque and force?

Torque is measured in units of newton-meters (Nm) or foot-pounds (ft-lb), while force is measured in newtons (N) or pounds (lb). In the metric system, torque is measured in Nm and force is measured in N. In the imperial system, torque is measured in ft-lb and force is measured in lb.

• Introductory Physics Homework Help
Replies
30
Views
2K
• Introductory Physics Homework Help
Replies
8
Views
751
• Introductory Physics Homework Help
Replies
6
Views
1K
• Introductory Physics Homework Help
Replies
25
Views
427
• Introductory Physics Homework Help
Replies
11
Views
418
• Introductory Physics Homework Help
Replies
7
Views
2K
• Introductory Physics Homework Help
Replies
9
Views
2K
• Introductory Physics Homework Help
Replies
31
Views
349
• Introductory Physics Homework Help
Replies
5
Views
1K
• Introductory Physics Homework Help
Replies
5
Views
2K