The qualitative definition of force is given by

State whether the following statement is true or false:
Force may or may not produce any motion in a body.

Name the physical quantity that measures inertia. State its $SI$ unit.

$(a)$ Why are the wheels of vehicles provided with mudguards?
$(b)$ $A$ cricket player lowers his hands while catching a ball. Why?
$(c)$ Why is a glass pane of a window shattered when a flying pebble hits it?

State the law of conservation of momentum. Mention two factors which determine the momentum of a body. $A$ ball of mass $0.4 \ kg$ is thrown vertically upwards with a velocity of $10 \ m s^{-1}$. What will be its initial momentum and what would be its momentum at the highest point of its reach? If this change in momentum occurs in one second, find the negatively accelerating force acting on the ball, when it was going up.

There are three solids made up of aluminium,steel,and wood,of the same shape and same volume. Which of them would have the highest inertia?