What is free body diagram, draw free body diagram for
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a free-body diagram is a useful means of describing and analyzing all the forces that act on a body to determine equilibrium according to Newton's first law or acceleration according to Newton's second law.
Net external force: →Fnet=∑→F=→F1+→F2+⋯F→net=∑F→=F→1+F→2+⋯
Definition of weight, vector form: →w=m→gw→=mg→
Definition of weight, scalar form: w=mgw=mg
Newton’s first law: →v=constant when→Fnet=→0Nv→=constant whenF→net=0→N
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