# What is the formula of work done class 9?

Work done (W) is the dot product of force (f) and displacement (ds). The formula is W = F · d s .

## What is work done in physics unit?

The SI unit of work is joule (J). Joule is defined as the work done by a force of one newton causing a displacement of one meter.

## What is the work of done?

Work is done when energy is transferred from one store to another. Work is also done when a force causes an object to move. When work is done against frictional forces acting on an object, the object’s temperature increases.

## What is work done class 11?

Work done by the force is equal to the product of the force and the displacement of the object in the direction of force. If under a constant force F the object displaced through a distance s, then work done by the force. W = F * s = F s cos θ

## What is work done example?

If the object against which the force is applied does not move, then no work is done. For example, if a man lifts a heavy bag from the floor and moves in a specific direction, work is said to be done. If a man carrying a heavy bag is standing still, no work is done according to the scientific definition of work.

## Why is the work done?

Work is done whenever a force moves something over a distance. You can calculate the energy transferred, or work done, by multiplying the force by the distance moved in the direction of the force.

## What is work write formula and SI unit?

Work = Force x displacement (expression for positive work) Work done is said to be positive if displacement of the object is along the direction of force applied. S.I unit of work done = Joule.

## What is work science class 9?

Work (W) Work is defined as a force acting upon an object to cause a displacement. It is expressed as the product of force and displacement in the direction of force.

## What is the symbol for work done?

work done (W) is measured in joules (J) force (F) is measured in newtons (N)

## How is work done measured?

Work done is measured as F×s×cosθ, where F and s are force and displacement respectively. The θ is the angle between force and displacement. Work done is a scalar quantity as it has only magnitude and no direction.

## What is work in physics easy?

In physics, work is defined as a force causing the movement—or displacement—of an object. In the case of a constant force, work is the scalar product of the force acting on an object and the displacement caused by that force.

## Is work done energy?

Work done has the same units as energy – joules. This is because energy is the ability to do work. So you must have energy to do work.

## What is the SI unit of work done and power?

The SI unit of work or energy is the joule.

## What is the work done in unit time?

And work done for a particular time or per unit time is called Power (P). SI unit of Power is Watt (W) named after Physicist James Watt.

## What is the formula of time and work?

Important Time and Work Formula Work Done = Time Taken × Rate of Work. Rate of Work = 1 / Time Taken. Time Taken = 1 / Rate of Work. If a piece of work is done in x number of days, then the work done in one day = 1/x.

## What is no work is done?

When there will be no component of force, parallel to the direction of motion then force F in direction of motion is zero, so work done will also be zero.

## What is work done short answer?

Answer: Work is said to be done when a force applied to an object moves that object. We can calculate work by multiplying the force by the movement of the object.

## What are the types of work done?

Positive, Negative and Zero work done.

## Is work a vector quantity?

Work has only a magnitude but no direction. The formula for work is written as a dot product of force and displacement. Therefore, work is a scalar quantity.

## What is work write formula?

Work done by a force acting on an object is equal to the magnitude of the force multiplied by the distance moved in the direction of the force. We define work to be equal to the product of the force and the displacement. Work done = force × displacement. W = F × s. 1J=1N×1m.

## What is work and unit?

Work is force applied over distance. Examples of work include lifting an object against the Earth’s gravitation, driving a car up a hill, and pulling down a captive helium balloon. Work is a mechanical manifestation of energy. The standard unit of work is the joule (J), equivalent to a newton – meter (N · m).

## What unit is energy?

Joule (J). This is the basic energy unit of the metric system, or in a later more comprehensive formulation, the International System of Units (SI).

## What is energy formula?

The formula for the energy of motion is: KE=0.5\times m\times v^2. where KE is kinetic energy in joules, m is mass in kilograms and v is velocity in meters per second.

## What is work and energy?

Work is defined as transferring energy into an object so that there is some displacement. Energy is defined as the ability to do work. Work done is always the same. Energy can be of different types such as kinetic and potential energy.