Question

A train is travelling at the speed of 180 km/hr. In order to trap superman Lex Luthor has broken the tracks.
Unware of Luthor's evil intensions, superman tries to stop the train by pushing it in opposite direction.
Right at the moment when the train is 300 m away from the crack in the track, Superman is
applying a deceleration of 5 m/s². Just after 2 sec a bullet laced with kryptonite hits superman which incapacitates him for a while. How long has super man got to remove the bullet and start to give
deceleration so to protect the innocents? (Trains brake system has failed)

a. 1s
b. 2s
c. 1.25s
d. 0s

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Answer 1

Answer:

(b) 2 sec

Explanation:

see the attachment