Question

A bullet of mass 144 g and a speed v passes completely through a pendulum of...

A bullet of mass 144 g and a speed v passes completely through a pendulum of mass 5.58 kg and length 63 cm. The bullet emerges with a speed that has been reduced by a factor of 1/4. The pendulum then travels in a complete and perfect circle.

(a) If the pendulum is suspended by a light, stiff rod, what is the minimum speed of the bullet?


(b) If the pendulum is suspended by a string, what is the minimum speed of the bullet?

(Please take your time to answer. The previous person answered in 5 mins, got the wrong answer, and it was also incomplete.)

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