Question

How would you mathematically interpret newtons second law of motion of force? Define SI Unit of force by using the interpretation. What is the unit of force?

Answer 1

Answer:

Suppose an object of mass'm', is moving along a straight line with an initial velocity of'u',. It is uniformly accelerated to velocity 'v', and in time 't'. The initial and final momentum of the object will be p1 and p2 =mv respectively.

Explanation:

The change in momentum is proportional to p2 - and p1

Which is proportional to mv - mu

Which is proportional to m x (v - u)

The rate of change in momentum is proportional to m x (v - u) /t

Or the applied force =,

F is proportional to m x (v - u) /t

F = km x (v - u) /t

F= kma

The SI unit is kg m/s square or N