## What is zero work done with example?

1) A simple example of zero work is when you stand holding a bag in your hands and do not move it. Your hands apply a force on the bag to balance the force of gravity exerted on it but since there is no displacement of the bag, the work done on it by you (your force) and also the gravity is zero.

## What is no work done in physics?

No work, as understood in this context, is done unless the object is displaced in some way and there is a component of the force along the path over which the object is moved. Holding a heavy object stationary does not transfer energy to it, because there is no displacement.

**What happens when work is zero?**

Zero work can occur under one of the following circumstances: An individual force is exerted but there is no displacement, or. There is a displacement but no individual force is exerted, or. An individual force is exerted in a direction perpendicular to the direction of the displacement, or.

**What is work and no work?**

Work is done whenever a force or a component of a force results in a displacement. No component of the force is acting in the direction of motion when the book is moved horizontally with a constant velocity. The force and the displacement are independent. No work is done by the hand on the book.

### What is the formula for zero work done?

When the work is done is zero in some situations, regardless of whether force is applied or not, is known as zero work is done. Zero work is done when the displacement of a body is zero or perpendicular (θ=900,cosθ=0) to the direction of force applied, then work done is zero.

### How do you know if work is zero?

Zero work is done when the displacement of a body is zero or perpendicular (θ=900,cosθ=0) to the direction of force applied, then work done is zero. For example, if a person tries to push a wall, he is applying force yet the wall does not move, so the displacement of the wall is zero, and hence work done is zero.

**In which case is no work done?**

work: A measure of energy expended in moving an object; most commonly, force times displacement. No work is done if the object does not move.

**Why is work done zero?**

Zero work is done when the displacement of a body is zero or perpendicular (θ=900,cosθ=0) to the direction of force applied, then work done is zero. Thus, the force applied and the displacement are in perpendicular directions. So, the work done is zero.

## What is no work force Class 9?

When a force acts perpendicular to the direction of displacement of a particle, then the force not do any work and is known as no work force.

## What is a SI unit of work?

The SI unit of work is the joule (J), the same unit as for energy.

**What is the SI unit work?**

S.I Unit of displacement = m. Hence Unit of Work = N-m. N-m is known as Joule (J), Hence unit of work is Joule.

**What is zero work?**

How Zero Works. And in any case, it is the number that captures the human imagination more than any other. The very existence of this article is evidence of that; you won’t find the article How Eighteen Works anywhere on this site. Zero is also the number — aside, arguably, from 666 — with the darkest connotations.

### When does work equal 0?

The net work done by all forces acting on an object is equal to the kinetic energy change of that object. If the net work is zero, that means there is no kinetic energy change. That means that once the object being lifted is in motion, it moves up at constant speed.

### When is work negative physics?

Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work. If the force has a component in the direction opposite to the displacement, the force does negative work.

**When is zero work done?**

Let us consider some cases where work is not done: Work is zero if applied force is zero (W=0 if F=0): If a block is moving on a smooth horizontal surface (frictionless), no work will be done. Work is zero if Cos θ is zero or θ = Π/2. Work done is zero when displacement is zero.