Calculate \(F_{A} \text { and } F_{B}\) for the beam shown in Fig. 9–49. The downward forces represent the weights of machinery on the beam. Assume the beam is uniform and has a mass of 250 kg.

Equation Transcription:

Text Transcription:

F_A and F_B

SOLUTION:Step 1 of 3The momentum is quantity of measurement of motion of object.Mathematically, p=mv In an isolated system , the total momentum is conserved because there is no external force acting on it . Consider two bodies Initial momentum of the bodies before collision p and p respec1ively 2 final momentum of the bodies after collision p and p respec1vely 2 From newton's second law F= dp dt Force exerted on 1 by 2 ,F = p1p1 12 t Force exerted on 2 by 1 ,F = p2p2 21 t By newton's third law F 12=-F 21 p1p1 (p2p2) t = t p 1 p =1(p - p )2 2 p 1 p =p1+ p 2 2 p - p =p + p 1 2 1 2 p = p f i\n