A train starting from rest accelerates uniformly for 100,,s, then comes to a stop with a unif

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2.Motion in Straight Line

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A train starting from rest accelerates uniformly for $100\,\,s,$ then comes to a stop with a uniform retardation in the next $200\,\,s.$ During the motion, it covers a distance of $3\,\,km.$ Choose the wrong option

A

Its acceleration is $0.2\,\,m/s^2$

B

Its retardation is $0.1\,\,m/s^2$

C

The maximum velocity is $20\,\,m/s$

D

The maximum velocity is $10\,\,m/s$

Solution

$\frac{1}{2} \times 300 \times V_{\max }=3000$

$\therefore \mathrm{V}_{\max }=20 \mathrm{m} / \mathrm{s}$

Standard 11

Physics

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