1.

.A stone, allowed to fall under gravity falls 5t^2 metresin t seconds. Find the distance travelled by the stonein the last two seconds before it reaches the ground,if the stone is dropped from a height of 180 m.(A) 30 m (B) 60 m (C) 100 m (D) 90 m​

Answer»

Answer:

OPTIONS:

a)30m b)60m c)100m d)90m

MyApproach:

I am not able to think logically how to USE the FORMULA to solve the problem.

Given,

1/2 g . t2=5t2

5t2= 180

=>t=6

To calculate the distance in the LAST 2 sec I did 5 . (6)2-5 . (4)2=100m



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