Two books are stacked on top of a table, book A resting on top of book B. The Fr

Question

Two books are stacked on top of a table, book A resting on top of book B. The Free Body Diagrams of the books are shown above, with the forces labeled by the type of force and a number. Which of the following forces are "force pairs" as described by Newton’s 3rd Law?


Include all answers that are Newton's 3rd pairs for this problem. There may be one or more. Note that the "+" in the problem is for sums of forces.

A) FN1 and FG1 are pairs
B) FN2 and FG2 are pairs
C) FN2 and (FN3 + FG2) are pairs
D) FN2 and (FG1 + FG2) are pairs
E) FN1 and FN3 are pairs
F) FN1 and FG2 are pairs
G) FG1 and FG2 are pairs
H) FG2 and FN3 are pairs
I) FN1 and FN2 are pairs
J) FG1 and FN3 are pairs
K) FN2 and FN3 are pairs
L) FG1 and FN2 are pairs
M) (FN1 + FN2) and (FG1 + FN3 + FG2) are pairs

Explanation / Answer

answer A,C,D,E,M are the Newton's 3rd pairs for this problem

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