Why are shock absorbers used in motor cycles and cars ?

Why are shockers used in automobiles like car?

Why are shockers used in cars, scooters and motorcycles?

A car travelling with a velocity of 50 km h^-1 on a straight road is ahead of a motor-cycle travelling with a speed of 75 kmh^-1 . How would the relative velocity be altered if motor cycle is ahead of car ?

Why shock absorbers are fitted to the automobiles.

Why is a ball bearing used in a cycle hub?

A car travelling with a velcity of 60 km h^(-1) on a straight road is ahead of a motor cycle travelling with a speed of 76 km h^(-1) . How would the relative velcity be alterd if motor cucle is ahead of car?