Force can be defined as change in velocity of an object of mass, m . That is the force is applied to make the object in motion or to accelerate it.
This can be represented as:
F=m\times a
Here,
F denotes the force
m denotes the mass
a denotes the acceleration.
Here the values are given as:
m=100 kg
a=4 m s⁻²
So F=m\times a
F=100\times 4
F=400 N
N denotes newton that is S.I. unit of force that is having dimension as kg ms⁻².