One joule

## What are the three formula for work?

Work formula is used to compute work done, force or displacement in any problem….W= F × d × cos/theta.

W It is the work done by the force.
F F is the force applied.
d It is the displacement caused by the force
/theta It is the angle between the force vector and the displacement vector.

## How is Class 9 work calculated?

Work Done

1. Work Done. •
2. Work done = force × distance.
3. = F × s. 1 Joule = 1 Newton × 1 metre.
4. • Work done by a force acting obliquely is equal to W = F cos θ × s. •
5. Energy. •
6. Power. •

## Why do we say that work is done class 9th?

1. When do we say that work is done? Answer: Work is said to be done whenever a force acts on a body and there is a displacement of the body caused by the applied force along the direction of the applied force.

## Do we say work is done?

Answer. Work is said to be done when force is applied on an object moves through a distance in the direction of application of force. It is same as the product of force and displacement.

## When we say the work is done?

Work is said to be done when the force is applied on an object and it moves through a distance in the direction of application of force.

## What do you mean by buoyancy Class 9?

When an object is immersed in water. it is pulled downwards due to gravitational pull of earth. Water exerts upward force on the object. This makes object rise up. This upward force is called buoyancy or upthrust.

## What is density Class 9?

The mass of a unit volume of a substance is called its density. Relative density of a substance is defined as the ratio between the density of the substance to the density of water at 40C. Relative density is also known as specific gravity. The relative density of a substance is a pure number without any unit.

## What are the 3 types of density?

Population density is often measured in three different ways. There is arithmetic density, physiological density, and agricultural density.

## What is density used for in math?

Density is the mass of an object divided by its volume. Density often has units of grams per cubic centimeter (g/cm3). Remember, grams is a mass and cubic centimeters is a volume (the same volume as 1 milliliter). You probably have an intuitive feeling for density in the materials you use often.