Posted by **kate** on Tuesday, October 26, 2010 at 5:42pm.

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-

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**MathMate**, Tuesday, October 26, 2010 at 7:11pm
.......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.

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**Deez Nutz**, Monday, December 14, 2015 at 4:52pm
Deez........................................................................................................................................................................................................................................................................................................................................................Nutz

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