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A car, moving with a speed of 50 km//hr,...

A car, moving with a speed of `50 km//hr`, can be stopped by brakes after at least `6 m`. If the same car is moving at a speed of `100 km//hr`, the minimum stopping distance is

A

` 12m`

B

` 18m`

C

`24 m`

D

` 6 m`

Text Solution

Verified by Experts

The correct Answer is:
C
Assuming constant retardation:
using ` v^(2) =u^(2) +2as rArr 0=u^(2)-2as or s= (u^(2))/(2a) or (s_1)/(s_2)=(u_1^(2))/(u_2^(2))`
` ( 6)/(s_2) =((50)/(100))^(2) rArr s_2 =24m`
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