AP EAMCET · PHYSICS · Motion In One Dimension
A person walks up a stalled escalator in \(80 \mathrm{sec}\). When standing on the same escalator, now moving, he is carried up in 20 s. The time taken by him to walk up the moving escalator is
- A \(4 \mathrm{~s}\)
- B \(8 \mathrm{~s}\)
- C \(12 \mathrm{~s}\)
- D \(16 \mathrm{~s}\)
Answer & Solution
Correct Answer
(D) \(16 \mathrm{~s}\)
Step-by-step Solution
Detailed explanation
Let distance travelled \(=\mathrm{D}\) Speed of a person walks up \(v_1=\frac{D}{80}\) Speed of escalator \(v_2=\frac{D}{20}\) Total speed \(\mathrm{v}=\mathrm{v}_1+\mathrm{v}_2 20\)…
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