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 52 times)

Capo · **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