A slender 6.2-kg rod can rotate ina vertical plane about a pivot at B. A spring of constant k = 290 N/m and of unstretched length 150 mm is attached to the rod as shown. Knowing that the rod is released from rest in the position shown ( pos(1)). The rod has rotated thro 90°. The work done by spring is 600 mm 120 mm 350 mm- Select one: Oa. 6.09 Оb. 1.34 Oc. 15.96 Od. 14.13 Oe. 9.26

Elements Of Electromagnetics
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A slender 6.2-kg rod can rotate in a vertical plane about a pivot at B. A spring of constant k = 290 N/m and of unstretched length 150 mm is attached to the rod as shown. Knowing that the rod is released from rest in the position shown ( pos(1) ). The rod has rotated through
90°. The work done by spring is
600 mm
B
120 mm
350 mm
Select one:
O a. 6.09
Ob. 1.34
Oc. 15.96
Od. 14.13
Oe. 9.26
The work done by weight is
Select one:
O a. 17.72
Ob. 10.94
Oc. 14.44
Od. 8.53
O e. 5.69
Polar moment of inertia about B is
Select one:
O a. 0.39
Ob. 0.51
Oc. 0.63
Od. 0.20
Ое. О.30
angular velocity at position 2
Select one:
Оа. 9.38
Ob. 4.88
Oc. 7.32
Od. 12.38
Ое. 15.20
Transcribed Image Text:A slender 6.2-kg rod can rotate in a vertical plane about a pivot at B. A spring of constant k = 290 N/m and of unstretched length 150 mm is attached to the rod as shown. Knowing that the rod is released from rest in the position shown ( pos(1) ). The rod has rotated through 90°. The work done by spring is 600 mm B 120 mm 350 mm Select one: O a. 6.09 Ob. 1.34 Oc. 15.96 Od. 14.13 Oe. 9.26 The work done by weight is Select one: O a. 17.72 Ob. 10.94 Oc. 14.44 Od. 8.53 O e. 5.69 Polar moment of inertia about B is Select one: O a. 0.39 Ob. 0.51 Oc. 0.63 Od. 0.20 Ое. О.30 angular velocity at position 2 Select one: Оа. 9.38 Ob. 4.88 Oc. 7.32 Od. 12.38 Ое. 15.20
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