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A train stops at two station P & Q which are 2 km apart .It accelerates uniformly from P at 1m/s*2 for 15sec & maintains a constant speed for a time before decelerating uniformly to rest at Q the decelration is 0.5ms*2, find time for which train is travelling at constant speed
A train stops at two station P & Q which are 2 km apart .It accelerates  uniformly from P at 1m/s*2 for 15sec & maintains a constant speed for a time before decelerating uniformly to rest at Q the decelration is 0.5ms*2, find time for  which train is travelling at constant speed

```
3 years ago

Kruthic
17 Points
```							When the train starts at PDisplacement in 15 seconds=ut+0.5at2 =0.5*1*15*15=225/2 metres.Velocity attained=u+at=1*15=15m/s.Let the train travel with 15m/s for t seconds.Displacement covered by the train while travelling with constant velocity=vt=15tWhile the train decelarates, v2-u2=2ass=(v2-u2)/2a=-15*15/2(-0.5)=225metresTotal displacement=225/2+15t+2252000=225/2+225+15t15t=1662.5Therefore , t=1662.5/15=110.83seconds.
```
3 years ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions