A pendulum bob of mass m is set into motion in a circular path in ...

[hubes95]

A pendulum bob of mass m is set into motion in a circular path in a horizontal plane as shown in the figure. The square of the angular momentum of the bob about the vertical axis through the point P is
 
   

   
  a.
  m² gl³ sin⁴ /cos
   
  b.
  m² gl³ sin³ /cos
   
  c.
  m² gl³ sin² /cos
   
  d.
  m² gl³ sin /cos
   
  e.
  m² gl³ sin²

Question 2

A puck on a frictionless air hockey table has a mass of 5.0 kg and is attached to a cord passing through a hole in the surface as in the figure. The puck is revolving at a distance 2.0 m from the hole with an angular velocity of 3.0 rad/s. The angular momentum of the puck (in kgm²/s) is
 
   

   
  a.
  80
   
  b.
  20
   
  c.
  30
   
  d.
  60
   
  e.
  50

[smrerig]

Answer to Question 1

a

Answer to Question 2

d

[hubes95]

Great answer, keep it coming

[fatboyy09]

Thanks for the timely response, appreciate it