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Grade: 9
`        A bodt of mass m is launched up on   a rough inclined plane making an angle 45 with horizontal . if the time of ascent is half of the time of desent ,the frictional coefficient between plane and body is`
4 months ago

## Answers : (1)

Vikas TU
9468 Points
```							Hiii Time taken to cover upward = TuTime taken to cover downward = TdTd = 2TuWe know that S = VoTu - ½ aTu^2 (Upward Motion)S= ½ a Td^2solving this , you will get Upper acceleration = 4 * below accelerationUsing Newons second law of motionmau = mgsinQ + mew*mgcosQmad = mgsinQ – mew*mgcosQputting the value and solving you will get mew = 3/5
```
4 months ago
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