Question

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

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

Answer 1

Answer: (D)

32 m

Answer 2

$s \propto u ^ { 2 }$ i.e. if speed becomes double then stopping distance will become four times i.e.$8 \times 4 = 32 m$