Hinge 18.0 kg. 0.005 00 kg Figure P11.30 An over- head view of a bullet striking a door.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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A 0.005 00-kg bullet traveling horizontally with a speed of 1.00 3 103 m/s strikes an 18.0-kg door, embedding itself 10.0 cm from the side opposite the hinges as shown in Figure P11.30. The 1.00-m wide door is free to swing on its frictionless hinges. (a) Before it hits the door, does the bullet
have angular momentum relative to the door’s axis of rotation? (b) If so, evaluate this angular momentum. If not, explain why there is no angular momentum. (c) Is the mechanical energy of the bullet–door system constant during this collision? Answer without doing a calculation. (d) At what angular speed does the door swing open immediately after the collision? (e) Calculate the total energy of the bullet–door system and determine whether it is less than or equal to the kinetic energy of the bullet
before the collision. (f) What If? Imagine now that the door is hanging vertically downward, hinged at the top, so that as shown is a side view of the door and bullet during the collision. What is the maximum height that the bottom of the door will reach after the collision?

Hinge
18.0 kg.
0.005 00 kg
Figure P11.30 An over-
head view of a bullet
striking a door.
Transcribed Image Text:Hinge 18.0 kg. 0.005 00 kg Figure P11.30 An over- head view of a bullet striking a door.
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