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Author Question: A 3.50-g bullet, traveling at 250 m/s, hits a hinged, light board at right angles, at a distance of ... (Read 44 times)

Capo

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on: Jul 29, 2018
A 3.50-g bullet, traveling at 250 m/s, hits a hinged, light board at right angles, at a distance of 55.0 cm from its hinges, and emerges on the other side of the board with a speed of 150 m/s.
 
  The board is initially stationary but is free to rotate about its hinges and has a moment of inertia of 0.275 kgm2. What is the angular speed of the board after the bullet emerges? A) 0.700 rad/s
  B) 3.05 rad/s
  C) 6.10 rad/s
  D) 0.0212 rad/s
  E) 22.6 rad/s

Question 2

A person's eye lens is 2.7 cm away from the retina. What must the focal length of this lens be in order for an object placed at the near point (N = 25.0 cm) of the eye to focus on the retina?
 
  A) -3.4 cm
  B) -2.4 cm
  C) 2.4 cm
  D) 3.4 cm
  E) 2.6 cm


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karlss

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Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

C


Capo

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Reply 2 on: Jul 29, 2018
Gracias!

ghepp

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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