A car travelling at a speed of 30 km / hour is brought to a halt in 8 m by applying brakes. If the same car is travelling at 60 km / hour , it can be brought to a halt with the same braking force in

Options

A. 8 m
B. 16 m
C. 24 m
D. 32 m

Answer

D

Explanation

`v^(2) = u^(2) + 2as`
`a = ((30)^(2))/(16)`
Now, `0 = (60)^(2) - 2 as'`