The 11.7-ft steel beam is being hoisted from its horizontal position by the two

Question

The 11.7-ft steel beam is being hoisted from its horizontal position by the

two cables attached at A and B. If the initial angular accelerations are

?1= 0.52 rad/sec2 and ?2 = 0.32 rad/sec2 ,

determine the initial values of (a) the angular acceleration ? (positive if

counterclockwise, negative if clockwise) of the beam, (b) the acceleration of

point C (positive if up, negative if down), and (c) the distance d (positive if to

the right, negative if to the left) from A to the point on the centerline of the

beam which has zero acceleration.

The answer must have the following units:

(a)

? =

rad/sec2

(b)

aC =

ft/sec2

(c)

d =

ft

Here is a link to the diagram and question:

http://i1334.photobucket.com/albums/w655/salonemark/5-122_zpsec49589c.jpg

  

(a)

     

? =

     

rad/sec2

     

(b)

     

aC =

     

ft/sec2

     

(c)

     

d =

     

ft

   The 11.7-ft steel beam is being hoisted from its horizontal position by the two cables attached at A and B. If the initial angular accelerations are ?1= 0.52 rad/sec2 and ?2 = 0.32 rad/sec2 , determine the initial values of (a) the angular acceleration ? (positive if counterclockwise, negative if clockwise) of the beam, (b) the acceleration of point C (positive if up, negative if down), and (c) the distance d (positive if to the right, negative if to the left) from A to the point on the centerline of the beam which has zero acceleration. The answer must have the following units

Explanation / Answer

(a)0.20 rad/sec2 (b)0.32ft/sec2 (c)5.85ft

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