AP EAMCET · PHYSICS · Motion In One Dimension
An athelete completes one round of a circular track of radius \(R\) in \(40 \mathrm{~s}\). What will be his displacement at the end of \(2 \min 20 \mathrm{~s}\) ?
- A \(7 R\)
- B \(2 R\)
- C \(2 \pi R\)
- D \(7 \pi R\)
Answer & Solution
Correct Answer
(B) \(2 R\)
Step-by-step Solution
Detailed explanation
The time \(=2 \min 20 \mathrm{~s}\) \(=2 \min +20 \mathrm{~s}\) \(=2 \times 60 \mathrm{~s}+20 \mathrm{~s}=140 \mathrm{~s}\) In \(40 \mathrm{~s}\) athelete completes \(=1\) round In \(140 \mathrm{~s}\) athelete will completes \(=\frac{140}{40} \text { round }\)…
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