AP EAMCET · PHYSICS · Motion In One Dimension
A car is moving along a straight line is brought to a stop within a distance of \(200 \mathrm{~m}\) and in time 10s. The initial speed of the car is
- A \(25 \mathrm{~ms}^{-1}\)
- B \(50 \mathrm{~ms}^{-1}\)
- C \(25 \mathrm{~ms}^{-1}\)
- D \(25 \mathrm{~ms}^{-1}\)
Answer & Solution
Correct Answer
(D) \(25 \mathrm{~ms}^{-1}\)
Step-by-step Solution
Detailed explanation
Given, displacement of car, \(s=200 \mathrm{~m}\) Time taken, \(t=10 \mathrm{~s}\) Final velocity of car \(=0\) Now using, Average velocity \(\times\) time \(=\) Displacement or \[ \left(\frac{v+u}{2}\right) \times t=s \] We get, \(\quad\left(\frac{0+u}{2}\right) \times 10=200\)…
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