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`         A bullet travelling with a velocity of 16 m/s penetrates a tree trunk and comes to rest in 0.4 m. Find the time taken during the retardation.`
3 years ago

Kevin Nash
332 Points
```										Sol. u = 16 m/s (initial), v = 0, s = 0.4 m.
Deceleration a = (v^2-u^2)/2s = -320 m/s2.
Time = t = (V -u)/a = (0-16)/(-320 ) = 0.05 sec.

```
3 years ago
Sai Sriker Reddy Kuskuntla
34 Points
```										u=16 m/s v=0S=0.4A=(v*v)-(u*u)/2A=0-256/0.8=-320t =(v-u)/a= -16/-320=0.05 secondTime taken during its motion in trunk=0.05 secondRetradation =320 m/s
```
5 months ago
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