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A physical pendulum consists of a vertical board of of mass 7 kg, length 173 cm,...

A physical pendulum consists of a vertical board of of mass 7 kg, length 173 cm, and width 5 cm hanging from a horizontal, frictionless axle. A bullet of mass 145 g and a purely horizontal speed v impacts the pendulum at the bottom edge of the board. The board then makes a complete circle.

(a) If the bullet embedded itself in the board, what is the minimum speed the bullet could have to make this so?

237.67 m/s INCORRECT

(b) If the bullet passed through the board, reducing its speed by a factor of 1/3, what is the minimum speed of the bullet?

486.58 m/s CORRECT

(c) If the bullet is made of rubber and rebounds elastically, what is the minimum speed the bullet could have?


(d) What is the rebound speed of the bullet?

I need help with part A, C, and D

Science   Advanced-Physics   
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