The figure shows a uniform, horizontal beam (length = 10 m, mass ...

[wrbasek0]

The figure shows a uniform, horizontal beam (length = 10 m, mass = 25 kg) that is pivoted at the wall, with its far end supported by a cable that makes an angle of 51 with the horizontal. If a person (mass = 60 kg) stands 3.0 m from the pivot, what is the tension in the cable?
 
   

   
  a.
  0.83 kN
   
  b.
  0.30 kN
   
  c.
  0.38 kN
   
  d.
  0.42 kN
   
  e.
  3.0 kN

Question 2

A mass m = 4.0 kg is connected, as shown, by a light cord to a mass M = 6.0 kg, which slides on a smooth horizontal surface. The pulley rotates about a frictionless axle and has a radius R = 0.12 m and a rotatinal inertia I = 0.090 kgm². The cord does not slip on the pulley. What is the magnitude of the acceleration of m?
 
 
 
   
  a.
  2.4 m/s2
   
  b.
  2.8 m/s2
   
  c.
  3.2 m/s2
   
  d.
  4.2 m/s²
   
  e.
  1.7 m/s2

[lorealeza77]

Answer to Question 1

c

Answer to Question 2

a