Rubber Crutch By What Factor Does The Tip Reduce The Pressure Exerted By The Crutch?
By what factor does the tip reduce the pressure exerted by the crutch? - rubber crutch
To (to prevent damage to soil and increase) the friction, a setting often fastened with a rubber tip at one end. If the end of the crutch is a circle of 1.1 cm radius without the tip and the tip is a circle with a radius of 2.5 cm, which factor is the tip to reduce the pressure of a crutch?
Where am I wrong?
That's what I do:
P = F / A
P2 / P1 = π r1 ^ 2 / (π r2 ^ 2) = 1.21 6.25 = 1936
(P1 - P2) / P1 = 1 - P2 / P1 = 8064
But this is not the answer. What am I doing wrong?
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