When we hear the word Force we get an idea of getting energized. We always come across the word push and pull related to it. So what exactly is this Force?

In short Force can be defined as the external agency which makes the body change its state, size, position under strain. It is denoted by F.

In general, the formula for force is given byWhere,

m = mass

a = acceleration.

It is expressed in Newton (N) or Kgm/s

Acceleration a is given by

Where v = Velocity and

t = time taken

So Force can be given as

Momentum is given by p = mv can also be called as inertia formula

Hence Force can be given as rate of change of momentum.

Force formulas are useful in finding out the force, mass, acceleration, momentum, velocity in any given problem.

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Problems based on force which may be helpful are given below:

Given: Mass of toy car m = 2 Kg,

Acceleration a = 8m/s

Force to be applied by aimmee is given by F = m $\times$ a

= 2 Kg $\times$ 8 m/s

= 16 Kgm/s

= 16 N.

Given: Mass of the hammer, m = 1 kg,

Initial Velocity u = 6 m/s,

Final velocity v = 0 m/s,

Time taken t = 0.1 s.

The acceleration is a = $\frac{v-u}{t}$.

a = $\frac{(0-6) m/s}{0.1 m/s^{2}}$

a = - 60 m/s

Thus the retarding force, F = ma

= 1 $\times$ 60

= 60 N.