QUESTION 9 In which of the following situations do the forces on the body sum to zero? O a. neither situation Ob. More information is needed to calculate O C. vertical forces of -80 N, +30 N, and +40 N O d. horizontal forces of -50 N, -20 N, +40 N, and +30 N

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: