Physics 5054 · O Level · Friction

Friction — practice question

A car is moving along a straight road at $60\,\text{km h}^{-1}$. The road surface is dry. The driver then brakes sharply. The table gives the thinking distance, the braking distance and the stopping distance. The same car, driven by the same driver at $60\,\text{km h}^{-1}$ on the same road, is now on a wet surface. Once again, the driver brakes sharply. What effect does the wet road have on the thinking distance, the braking distance and the stopping distance?

  • Ano change, increases, increases
  • Bno change, no change, no change
  • Cincreases, increases, increases
  • Dincreases, no change, increases

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