The vehicles are fitted with shockers why

Shockers acts as a shock absorber in the vehicle making the ride comfortable. When vehicle goes on rough road then it gets shocks from the road deformities the springs present in the shockers provide counter force and thus making the vehicle stable ride without shock.

[I copied this from the internet, but hope it helps!]

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach