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A wooden plank of mass 20kg is resting on a smooth horizontal floor.A man of mass 60kg starts moving from one end of the plank to the other end.The length of the plank is 10m.Find the displacement of the plank over the floor when the man reaches the other end of the plank.
A wooden plank of mass 20kg is resting on a smooth horizontal floor.A man of mass 60kg starts moving from one end of the plank to the other end.The length of the plank is 10m.Find the displacement of the plank over the floor when the man reaches the other end of the plank.

```
3 years ago

13 Points
```							7.5m
```
2 years ago
Roshan Shah
16 Points
```							Answer is 7.5m Use simple trick S : (m/M+m)*LWhere m: mass of wooden planck            M : mass of man            L: boat lengthNow Net displacement of boat = 10-S
```
2 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