Table of Contents

- 1 Can an object have net torque but no net force?
- 2 What happens when net torque is zero?
- 3 Can an object have torque without force?
- 4 What happens when a net torque is applied to a rigid object?
- 5 Does net torque equal net force?
- 6 Is it possible to zero torque?
- 7 What is the difference between net torque and net moment/torque?
- 8 Is it possible to have torque without force?

## Can an object have net torque but no net force?

Since torque is always about some point, if there’s a net force on an object you can always find some point about which there will be a torque. But you can certainly have a net force on an object that gives no torque about its center of mass.

## What happens when net torque is zero?

Because there is no net torque acting on an object in equilibrium, an object at rest will stay at rest, and an object in constant angular motion will stay in angular motion. Because the net torque is equal to zero, the torques in Example 1 are balanced and acting in equilibrium.

**Can the force be zero and the torque nonzero?**

(a) If the torque is zero then r × F = 0 Now N = r × F hence N = 0 ⇒ r or F is zero, or r and F are parallel. Using Newton’s 2nd law: 0 = N = ˙L ⇒ L = constant. Thus L just needs to be constant (not necessarily zero). Answer: Yes.

### Can an object have torque without force?

The answer is no. which is in general non vanishing. The important result associated is that if the resultant external force vanishes then the torque is independent of the point it is calculated. It has the same value with respect to any point.

### What happens when a net torque is applied to a rigid object?

When a torque is applied to an object it begins to rotate with an acceleration inversely proportional to its moment of inertia. This relation can be thought of as Newton’s Second Law for rotation. The moment of inertia is the rotational mass and the torque is rotational force.

**When a net torque is zero on an object system What does it mean?**

rotational equilibrium

If the net torque on a rotatable object is zero then it will be in rotational equilibrium and not able to acquire angular acceleration.

## Does net torque equal net force?

Net torque changes the rotational velocity of an object. Net force changes the velocity of an object.

## Is it possible to zero torque?

torque = mass x rate of change of velocity x radius from point of contact to point of rotation . If your angular velocity is constant (the rate of change of angular velocity is 0), you can be turning but have no net torque.

**Why is the net torque never zero?**

If the net force is zero, the net moment/torque has nothing to do with the net force. Net Force (F) is equal to the vector sum of individual forces. Net Torque (T) is equal to the vector sum of individual forces multiplied with their moment arms. Eq. (1) and Eq. (2) have no correlation. Hence, in general the net torque is not zero.

### What is the difference between net torque and net moment/torque?

Torque is the product of force and the perpendicular arm. If the net force is zero, the net moment/torque has nothing to do with the net force. Net Force (F) is equal to the vector sum of individual forces. Net Torque (T) is equal to the vector sum of individual forces multiplied with their moment arms.

### Is it possible to have torque without force?

Since torque is always about some point, if there’s a net force on an object you can always find some point about which there will be a torque. But you can certainly have a net force on an object that gives no torque about its center of mass.

**Does torque have to be zero if an object is spinning?**

If the torque on an object is not zero, then it must be spinning, and anything with acceleration must have unequal force upon it. Yes. Take, for example, a body in frictionless free-fall. The net torque is zero because the gravitational force acts on the center of mass.