The person weighs 170 lb. Each crutch makes an angle of 22.0 with the vertical. Half of the person's weight is supported by the cruches, the other hal

defazajx

defazajx

Answered question

2021-03-17

The person weighs 170 lb. Each crutch makes an angle of 22.0 with the vertical. Half of the persons

Answer & Explanation

stuth1

stuth1

Skilled2021-03-19Added 97 answers



free body diagram of cruches
from the first diagram (nground=1702=85 lb)
Fx=F1sin22F2sin22=0
Fy=2Fcos22+85lbs170lbs
so F=45.8lbs
From the second diagram
Fx=f45.8lbssin22=0 f=17.2lbs
Fy=ntip45.8cos22=0 ntip=42.5lbs
for minimum coefficient of friction
μ=fntip=0.404
b) compressing force F =45.8lbs.

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