Light requires 4.5 years to travel from the nearest star to earth. If we could travel there in a spaceship going 90% of the speed of light, the trip would require 5.0 years according to clocks on earth. How much time would pass for the passengers in the ship

Time according to earth clock (T0) = 0.22 years (Approx)

Explanation:

Given:

Time taken by light = 4.5 years

Time taken by ship = 5 years

Speed of light = c

Speed of ship (v) = 90% of c = 0.9c

Find:

Time according to earth clock (T0) = ?

Computation:

Time dilation is ,

Time according to earth clock (T0) = 0.22 years (Approx)

prolly a beacuse the momentuem the car has increases while going down hill

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