Force on Fulcrum | Girl (36kg) & Boy (60kg) Homework Solution

AI Thread Summary
The problem involves a seesaw with a girl weighing 36 kg positioned 5 m from the fulcrum and a boy weighing 60 kg positioned 3 m from the fulcrum. Using the equilibrium equation Fr1=Fr2, the boy's mass was confirmed to be 60 kg. To find the force on the fulcrum, it is noted that it must equal the total downward weight of both children. Therefore, the force on the fulcrum is the sum of their weights, which is 36 kg + 60 kg, resulting in a total force of 96 kg. Understanding these principles is crucial for solving similar physics problems involving levers and balance.
R Sarwar
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Homework Statement


A girl and a boy are sitting in a see saw. The girl is 36 kg and sitting 5 m from the fulcrum. The boy is sitting 3 m from the fulcrum. Calculate the mass of the boy and the force on the fulcrum.

Homework Equations


Fr1=Fr2

The Attempt at a Solution


I solved for the boys mass by using the Fr1=Fr2 equation. I got 60 kg as the boys mass. I don't know how to solve for the force on the fulcrum.
 
Physics news on Phys.org
If the see-saw is perfectly balanced the fulcrum must push upward with a force equal to all the downward weight on the see-saw.
 
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