Braking distance scale law

Braking distance scale law

Secondary 2
TGM Original Questions

A vehicle’s braking distance is directly proportional to the square of its speed. At speed \(v\), the distance is \(20\) m. If the speed is reduced by \(40\%\), find

  1. the new braking distance, and
  2. its percentage decrease.

Solution:

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Answer:(a) \(7.2\) m; (b) \(64\%\) decrease.

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