Density is the mass of a substance per unit volume.
A vector has a size and a direction. The size is called the magnitude of the vector.
Answer:
a

b

Explanation:
From the question we are told that
The initial position of the particle is 
The initial velocity of the particle is 
The acceleration is 
The time duration is 
Generally from kinematic equation

=> 
=> 
Generally from kinematic equation

Here s is the distance covered by the particle, so

=> 
Generally the final position of the particle is

=> 
=> 
Force = 0.20N .F = m ×a .& a = v/t then the f = m×v/t