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In part b) the moment which is in red color why doesn't equal -T( AP + Radius )  since they are perpendicular. Why did he use the components of T

In part b) the moment which is in red color why doesn't equal -T( AP + Radius )  since they are perpendicular. Why did he use the components of T

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In part b) the moment which is in red color why doesn't equal -T( AP + Radius ) 

since they are perpendicular. Why did he use the components of T 

The length of the bar AP is 750mm. The radius of the pulley is 125mm, Equal forces T=75N are applied at the ends of the cable. What is the sum of the moments of the forces (a) about A and (b) about P. A a) EM₂₁² = Z b) EMP = P = T 45° 45° 750 750 √2 +TR-TR=0 30° = +TR-T230° ( 7600 + R cas300) - T sin 30° ( 700 + R sin 300) 54333 N.mm T IR - TR (sia ²30°7 Co₂² 30*) or Rco2 300 - Rain 300 To 300 54.3 №.m * Tsin300 T 750 T (06230°+ sin 30)
Transcribed Image Text:The length of the bar AP is 750mm. The radius of the pulley is 125mm, Equal forces T=75N are applied at the ends of the cable. What is the sum of the moments of the forces (a) about A and (b) about P. A a) EM₂₁² = Z b) EMP = P = T 45° 45° 750 750 √2 +TR-TR=0 30° = +TR-T230° ( 7600 + R cas300) - T sin 30° ( 700 + R sin 300) 54333 N.mm T IR - TR (sia ²30°7 Co₂² 30*) or Rco2 300 - Rain 300 To 300 54.3 №.m * Tsin300 T 750 T (06230°+ sin 30)
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