Question

A car starts from rest and accelerates uniformly at 2m/s square for 8 seconds. Find out the distance travelled by the car in fifth second of it's journey

Answer 1

Answer:

The car will cover a distance of 16m/s

Explanation:

In 1 sec, Car travells a distance of 2m

Therefore, In 8 sec, Car will travell a distance of 2m×8

= 16 m Ans

Answer 2

Answer:

u= 0, a= 2m/s², t = 8sec

let t = n

distance travelled in nth second = un + 1/2 a n²

distance travelled in 5th sec = u(n-5) + 1/2 x 2 x (n-5)²

=> 0 + 1 x (8-5)²

=> 1 x 9= 9m

answer is 9m