Two professors sit on a 130 N beam while pontificating Help
Two professors sit on a 130 N beam while pontificating. Help them determine the support reactions.
Drawing not to scale.
What is the vertical component of the reaction at A?
(include units with answer)
What is the vertical reaction at B?
(include units with answer)
Solution
Let us first examine what is the equilibrum position, by observing the torque at B
Torque By prof 1 = 2.8 x 900 N = 2520 Nm
Torque by prof 1 = 2.4 x 760 N = 1824 Nm
there fore the rod stays put and stable parallel to surface
rod\'s center of mass is 4.2 cm from A and 1 cm from B
Normal Force by rod on A = 130 ( 1 / 4.2 )
Normal Force by rod on B = 130 ( 3.2/4.2)
Normal force by prof 1 on A = 900 ( 6-3.2)/6
Normal force on Prof 1 on B = 900( 3.2)/6
Normal force by prof 1 on A = 760( 2.4)/6
Normal force on Prof 1 on = 760 ( 6-2.4)/6
Total Normal froce on A = 755 N
Total Normal force on B = 1035 N
