Power

Definition of power

Power is workdone per unit time.

Unit of power

Unit of power is J/s(joule per second)

Which is also known as watt.

Power = work done

Time

Work

Defonition of work

Work is defined when a force moves through a distance .

So,

Work = Force × distance in direction of force

W=F•d

Unit of work

Unit of work is N•m(Newton into metre)

Which is also known as (j)Joule

Work is depend on distance so work is vector quantity

Pressure

Definition of pressure

Pressure is defined as force per unit area.

Pressure = Force
Area

P=F/A

Unit of pressure

Unit of pressure is N/m²(Newton per meter square) which is also known as pa(pascal).

1pa = 1N/m²

Pressure is scaler quantity .

Weight

Definition of weight

A force exerted by gravity is defined as weight

Weight = mass × gravitational force

W= m•g

Unit of weight

Unit of weight is kg•m/s²

Weight is dependent on gravity so weight is not constant and also gravity is vector quantity, weight is vector quantity

Force

Definition of force

The multiplication of acceleration and mass of object is defined as force as newton's second law.

Unit of force

Unit of force is N (Newton) which is equal to kg•m/s² (kilogram into metre per second square)

Force = mass × acceleration

F = ma

Hence acceleration is vector quantity Force is also vector quantity.

Acceleration

Definition of acceleration

Acceleration is defined as change of velocity per unit time

Unit of acceleration

Unit of acceleration is m/s²(meter per second square)

Acceleration = chenge in velocity
Time

Here acceleration is vector quantity

Because it depends on velocity which is also vector quantity

Velocity

Definition of velocity

Velocity is speed of moving object per unit time

Velocity = Distance