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You are driving at 100 km/h. What distance are you most likely to cover before you can stop?

A. 40 metres
B. 80 metres
C. 140 metres

Answer :

Final answer:

At 100 km/h, the braking distance alone may be around 30-40 meters, but considering reaction time the total stopping distance could exceed 80 meters, making option c (140 meters) a more realistic estimate for many real-world situations.

Explanation:

When driving at 100 km/h, the distance you can cover before stopping depends on multiple factors including reaction time and braking efficiency. Using standard calculations for braking distance, the calculation typically assumes a driver's reaction time of about 1 second and a braking deceleration dependent on the coefficient of friction between the tires and the road. For dry asphalt with reasonable braking conditions, the braking distance might be roughly 30-40 meters, but this does not include reaction distance. The reaction distance at 100 km/h (which translates to approximately 27.8 meters per second) would be 27.8 meters. Therefore, the total stopping distance is the sum of reaction distance and braking distance, which would likely exceed 80 meters. Factors such as road conditions, vehicle condition, distraction, and more can further increase this distance. Therefore, while the exact figures can vary, option b (80 meters) is not a reasonable estimate for the total stopping distance, with option c (140 meters) being more realistic for many situations.

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