Which of the following has the largest inertia?

An object experiences a net zero external unbalanced force. Is it possible for the object to be moving with a non-zero velocity? If yes,state the conditions that must be placed on the magnitude and direction of the velocity. If no,provide a reason.

The quantitative definition of force is given by

$A$ large truck and a car,both moving with a velocity of magnitude $v$,have a head-on collision and both of them come to a halt after that. If the collision lasts for $1$ second:
$(i)$ Which vehicle experiences the greater force and why?
$(ii)$ Which vehicle experiences the greater change in momentum and why?
$(iii)$ Which vehicle experiences the greater acceleration and why?

The acceleration of a body is to be doubled from its initial value. By what factor is the acting force to be increased?

Give two examples in each case,of a force that:
$(i)$ lifts
$(ii)$ pushes
$(iii)$ pulls
$(iv)$ stretches
$(v)$ compresses
$(vi)$ resists
$(vii)$ attracts
$(viii)$ squeezes