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A particle moves with constant accelerat...

A particle moves with constant acceleration along a straight line starting from rest. The percentage increase in its displacement during the 4th second compared to that in the 3rd second is

A

`33%`

B

`40%`

C

`66%`

D

`77%`

Text Solution

Verified by Experts

The correct Answer is:
B
`s_(n) = u+(1)/(2)a (2n-1)`
`s_(3) = (5)/(2)a , s_(4)= (7)/(2)a`
`:. (s_(4)-s_(3))/(s_(3))xx100 = (a)/(((5a)/(2)))xx100= 40%`
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