Braking distance scale law
Braking distance scale law
Secondary 2
4 marks
TGM Original Questions
Optional extension
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
- the new braking distance, and[2]
- its percentage decrease.[2]
Solution:
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Answer:(a) \(7.2\) m (b) \(64\%\) decrease.
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