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
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a
8 m
b
16 m
c
24 m
d
32 m
answer is D.
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Detailed Solution
s∝u2 i.e. if speed becomes double then stopping distance will become four times i.e. 8×4=32ms2s1=u22u21