Question

A 3.0 m long rigid beam with a mass of 100 kg is supported at each end. An 60 kg student stands 2.0 m from support 1. How much upward force does each support exert on the beam?

support 1-
support 2-

Answer 1

.......100..60......
..........v......v.......
----------------------
^.......................^
R1.................R2

Take moments about R1,
R2*3=100*1.5+60*2.0
Take moments about R2
R1*3=100*1.5+60*1.0
Solve for R1 and R2. They should add up to 100+60.

Answer 2

All of that stuff but than multiple R1, R2 by 9.8