Question

if a body is traveling in straight line then the net force acting on it is​

Answer 1

Answer:

Newton's First Law of Motion states that a body at rest will remain at rest unless an outside force acts on it, and a body in motion at a constant velocity will remain in motion in a straight line unless acted upon by an outside force. ... Outside forces are sometimes called net forces or unbalanced forces.

Answer 2

If an object is moving in a straight line with position function s(t), then the force F on the object at time t is the product of the mass of the object times its acceleration.

F = m d^2s/dt^2