Question

Why are shockers used in scooters and cars? Explain.
(A). Decreases friction
(B). Increases the time of impact
(C). Increases friction
(D). Decorative

Answer 1

Hint – To find out why, we understand the meaning of a shocker and its functionality. Here impulse applied to an object produces an equivalent vector change in its linear momentum, in the same direction and its SI unit is Newton second (N-s).
Formula Used: ∆p = F ∆t

Complete step-by-step solution -
A shock absorber (aka "damper") is a mechanical or hydraulic device designed to absorb and damp shock impulses. It does this by converting the kinetic energy of the shock due to the moving vehicle into another form of energy (typically heat) which is then dissipated.
When a vehicle moves over an uneven road, it receives jerks. So the vehicle receives the impulsive force. To minimize this impact shock absorbers are used.
The formula of an impulse is given by: ∆p = F ∆t
Where ∆p is the change in momentum, F is the applied force and ∆t is the time elapsed.
By observing this formula we can say the Force of impact and the time duration of impact are inversely proportional to each other. I.e. if one increases the other decreases and vice versa.
${\text{F }}\alpha {\text{ }}\dfrac{1}{{\Delta {\text{t}}}}$.
The shock absorbers increase the time of jerk (impact), thereby reducing the impulsive force. This minimizes the damage to the vehicle.
Hence Option B is the correct answer.

Note – In order to answer questions of this type the key is to understand the concept of physics that takes place in the working of a shock absorber. Once we understand it has something to do with impulse, we use its formula and draw our conclusions out of it.