a 3.0 m long rigid beam with a mass of 130 kg is supported at each end. an 90 kg student stands 2.0 m from support 1. how much upward force does each support exert on the beam?

The upward force exert by the beam is 108.333kg.We are given that,The beam length = 3mThe mass of beam = 130kgSince, it is supported at both ends, the support reaction toThe mass of rigid beam = 130/2=65 kgThe student whose weight of 90 Kg stands on the beam at 2m from left., Let the support reaction at left end of beam = RaThe support reaction at right end = RbTaking moment about left end, 65×2= Rb×3. Rb=65×2/3=43.333 KgRa = 65 - 43.333 = 21.667 KgTherefore, the upward force or left end ‘A’ = 65+21.667=86.667 KgUpward force at right end = 65+43.333=108.333 KgTo know more about forcehttps://brainly.com/question/3882839#SPJ4