Force Calculated: Harris & Paul's Surfboard Challenge

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Harris and Paul are carrying a surfboard that is 2.43 m long and weighs 155 N, with Paul lifting one end with a force of 85 N. The remaining force that Harris needs to exert is calculated as 70 N. To determine how far from Paul Harris should lift the board, the concept of rotational equilibrium must be applied, specifically using the equation for the sum of moments about any point equaling zero. The discussion highlights a lack of understanding regarding moments and torques, which are essential for solving the problem. Clarification on these concepts is necessary for Harris to proceed with the calculations.
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Homework Statement



Harris and Paul carry a surfboard that is 2.43 m long and weighs 155 N. Paul lifts one end with a force of 85 N.

What part of the board should Harris lift?
m from Paul

Homework Equations


T=Fd

The Attempt at a Solution


I just did 155N-85N
=70N
which is the amount Harris exerted,

After getting that force I am unsure of what to use to get the "d" he needed
 
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You're missing the eqaution for rotational equilibrium, the sum of moments about any point = 0. Are you at all familiar with moments or torques, and the calculation of their directions and values?
 
PhanthomJay said:
You're missing the eqaution for rotational equilibrium, the sum of moments about any point = 0. Are you at all familiar with moments or torques, and the calculation of their directions and values?

not sure exactly?
what would I have to do from here?
 
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