If the speed of a vehicle become 3 times for a given deceleration its stopping distance become .....

Options

A. two
B. three
C. nine
D. four

Answer

C

Explanation

2a is equal iri stopping distance `d = (v_(0)^(2))/(2 a)`
`prop v_(0)^(2)`
`(d_(2))/(d_(1))= ((v_(0))_(2)^(2))/((v_(0))_(1)^(2)) = (3v_(0))/(v_(0)) = (3)^(2) `= nine