Give examples of law of inertia.

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

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

Which of the following has more inertia—a rubber ball or a stone of same size? Why?

A long jumper runs for a while before taking long jump so that the inertia of _____ helps him in taking a long jump.

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

Give two examples of each:

Inertia of rest

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.

Define inertia.

What is the measure of inertia?

What is the relationship between mass and inertia? Discuss.