Give one real life example of inertia.

Find the retardation with which a train moving at $108 \mathrm{km}/\mathrm{hr}$ is brought to rest in $12$ seconds.

Passengers tend to fall forward if the bus is stopped suddenly and fall backwards when it accelerates from rest. Explain

Why do we jerk clothes before spreading them on line?

Give two examples each of Inertia of rest, Inertia of motion, and inertia of direction.

Sparks fly off tangentially when a knife is rubbed on a hard rotating disc. How can you account for this.

A ball is given some velocity at A and moves along a semi-circular ring fixed on a smooth horizontal table. The dotted line shows the path of the ball. In which direction $1, 2, 3$the ball will leave the ring.