Question

Two motor car starting off with a time gap of 2 minute, travel in the same direction with the same direction with the same acceleration. Time taken by the second car since its departure to complete (1/9)™of the distance covered by the first car is

Answer 1

Answer:

Explanation:

Let t be time in seconds when the second car has travelled (1/9)th of distance travelled by first car as given in question.

 

There is a gap of 2 min or 120 s between the starting time of both the cars.

 

Distance travelled by first car, S1 = (1/2)×a×(120+t)2 .................(1)

 

Distance travelled by Second car, S2 = (1/2)×a×t2 ..................(2)

 

if S2 = (1/9)S1, then (1/18)×a×(120+t)2 = (1/2)×a×t2  ...........(3)

 

solving for t in eqn.(3), we get t = 60 s

Answer 2

Answer:

60 seconds=1 minute

Explanation:

hope it helps you