
https://www.questionsolutions.com/wp-content/uploads/2018/08/1n.png
https://www.questionsolutions.com/wp-content/uploads/2018/08/22.png
Image from: Hibbeler, R. C., S. C. Fan, Kai Beng. Yap, and Peter Schiavone. Statics: Mechanics for Engineers. Singapore: Pearson, 2013.