Pendulum problem in KE chapter

  • Thread starter esinn08
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  • #1
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Hi Everyone,

My question is as follows:

A bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed v/2. The pendulum bob is suspended by a stiff rod of length and negligible mass. What is the minimum value of v such that the pendulum bob will barely swing through a complete vertical circle? (Use M for M, m for m, l for , and g for gravity, as necessary.)

Any suggestions would be greatly appreciated! :smile: Thanks so much!
Sincerely,
esinn08
 

Answers and Replies

  • #2
Doc Al
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Why don't you give it a shot? Here's a hint: You'll need to use two conservation laws.
 
  • #3
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Doc Al said:
Why don't you give it a shot? Here's a hint: You'll need to use two conservation laws.

1) conservation of momentum
2) conservation of energy

Am I right?
 
  • #4
Doc Al
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45,093
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You are correct.
 

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