An elastic collision of two objects is characterized by the ...

[Medesa]

An elastic collision of two objects is characterized by the following.
 
  A) Total momentum of the system is conserved.
  B) Total kinetic energy of the system remains constant.
  C) Both A and B are true.
  D) Neither A nor B are true.

Question 2

When a 2.75-kg fan, having blades 18.5 cm long, is turned off, its angular speed decreases uniformly from 10.0 rad/s to 6.30 rad/s in 5.00 s.
 
  (a) What is the magnitude of the angular acceleration of the fan? (b) Through what angle (in degrees) does it turn while it is slowing down during the 5.00 s? (c) If its angular acceleration does not change, how long after it is turned off does it take the fan to stop.

[jordangronback]

Answer to Question 1

C

Answer to Question 2

(a) 0.740 rad/s2 (b) 2330 (c) 13.5 s

[Medesa]

Thanks

[jordangronback]

Welcome