Physicshard · Past Paper
A car moving at 40 km/h can be stopped by brakes in 2m. If the same car moves at 80 km/h, the stopping distance is:
A4 m
B6 m
C8 m
D16 m
✓ Correct Answer: C — 8 m
Stopping distance is proportional to the square of velocity (s = v^2 / 2a). If velocity doubles, distance quadruples (2m * 4 = 8m).
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