## What is the formula for Power?

Power (P) is the rate at which work is done. It is the amount of energy consumed per unit time.

**Formula of power is work / time**

Unit of power is Joule second-1 or watt

Symbol is** w**

Power (P) is the rate at which work is done. It is the amount of energy consumed per unit time.

**Formula of power is work / time**

Unit of power is Joule second-1 or watt

Symbol is** w**

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Work or Energy

When a displacement of an object occurs due to force it is said the work was done upon the object. In order for a force to qualify as having done *work* on an object, there must be a displacement and the force must *cause* the displacement. Energy is defined as the capacity to do work.

Formula for Work or Energy is Energy = force × displacement

**E = f × d**

Unit for Work or Energy is Joule

Symbol for Work or Energy is J

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Impulse (Imp or J)

When an object is acted upon by a force for an interval of time, the change of momentum of that object is Impulse. Simply, Impulse is the product of force and time for which it acts. Impulse is also a vector quantity in the same direction as force. Impulse helps you calculate the change in momentum, or you can use impulse to calculate the average impact force of a collision.

Formula for Impulse = force × time

**J = f × t**

Unit of Impulse is Newton second

Symbol of Impulse is Ns

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Force (F)

It is agency which changes or tends to change an objects state of rest or state of uniform motion along a straight line. A force is a push or pull upon an object which is because of object’s interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. For example, a golf ball moves when it is pushed.

Formula for Force = mass × acceleration;

**F = m × a**

Unit for Force is Newton

Symbol for Force is N

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Momentum (p) –

The product of an object’s mass and velocity is momentum. It is vector, meaning that it has both magnitude and direction.It refers to the quantity of motion that an object has. A train that is on the move has the momentum. Simply it can be described as “mass in motion”.

Formula for Momentum = mass × velocity;

**p = m × v**

Unit for Momentum is metre second^{-1}

Symbol for Momentum is ms^{-1}

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