Question
30. As shown in Figure P9.30, a
bullet of mass m and speed v
passes completely through a
pendulum bob of mass M. The
bullet emerges with a speed
of v/2. The pendulum bob is
suspended by a stiff rod (not a
string) of length l and negli-
giblemass. What is the mini-
V/2
Figure P9.30
mum value of v such that the pendulum bob will barely
swing through a complete vertical circle?

Image Transcription

30. As shown in Figure P9.30, a bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed of v/2. The pendulum bob is suspended by a stiff rod (not a string) of length l and negli- giblemass. What is the mini- V/2 Figure P9.30 mum value of v such that the pendulum bob will barely swing through a complete vertical circle?

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Kinematics

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