JEE Mains · Physics · STD 11 - 2. motion in straight line
A car is moving with speed of \(150\,km / h\) and after applying the brake it will move \(27\,m\) before it stops. If the same car is moving with a speed of one third the reported speed then it will stop after travelling \(....m\) distance.
- A \(2\)
- B \(1\)
- C \(4\)
- D \(3\)
Answer & Solution
Correct Answer
(D) \(3\)
Step-by-step Solution
Detailed explanation
Stopping distance \(=\frac{ v ^{2}}{2 a }= d\) If speed is made \(\frac{1}{3} rd\) \(d^{\prime}=\frac{1}{9} d . \quad d^{\prime}=\frac{27}{9}=3 \text {. }\) Braking acceleration remains same
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