When a car of mass 1167 kg accelerates from 10.0 m/s to some final speed, 4.00 × 105 j of work are done. find this final speed?

final speed = 28 m/s

Explanation:

As per work energy theorem we know that

Work done on the object = change in kinetic energy

so here we have

now we will have

also we know that

mass = 1167 kg

and initial speed is given as

now from above work energy equation we will have

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.