The momentum of a body of given mass is proportional to its

When a missile is fired from a tank,it gets a momentum of $2000 \ kg \ m \ s^{-1}$. If the velocity of the missile is $50 \ m \ s^{-1}$,what will be its mass (in $kg$)?

$A$ passenger in a moving train tosses a coin which falls behind him. It means that the motion of the train is

An object of mass $2\, kg$ is sliding with a constant velocity of $4\, m\, s^{-1}$ on a frictionless horizontal table. The force required to keep the object moving with the same velocity is (in $, N$)

Two friends on roller-skates are standing $5\, m$ apart facing each other. One of them throws a ball of $2\, kg$ towards the other,who catches it. How will this activity affect the position of the two? Explain your answer.

Which has the highest inertia among solids made of aluminium,steel,and wood of the same shape and same volume?