A shot travelling at 100 ms is just able to
pierce a plank 4 cm thick. What is the velocity
required for the shot to pierce a similar plank of
9 cm thickness ?
moninaith
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Answer:
150m/second
Use Kinetic Energy Theorem
Which is valid everywhere
- work done by all force(conservative+Nonconservative) = change in KE
- W =∆KE
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