Question

A steel beam of mass m= 5 kg and length L=1.50 m is attached to a fixed point P about which it can rotate without friction. Initicently beam is held at an angle of 30 degree which the vertical ; as shown in the picture. The moment of inertia of the beam about tis center of mass is Mb^2/12. Now the beam is released first rest.

a) calculate the touque of weight if the beam about prvot P at the moment of relase.

b) initial angle acceleration of the moment of release

c) initial tauqontial acclereation of the center of mass of the beam the moment of release?

d) use the consenquenes of energy to calcualte the angular speed or beam for vertial

e) speed of the center of mass of the beam when its vertical

m =5.0 kg angle = 30 degree L=1.5

ml^2/12

Answer 1