63. Box A weighs 80 N and rests on a table (Figure 4-41). A rope that connects boxes A and B drapes over a pulley so that box B hangs above the table, as shown in the figure. The pulley and rope are massless and the pulley is frictionless. What force does the B. table exert on box A if box B weighs (a) 35 N; (b) 70 N; (c) 90 N? Figure 4-41 Problem 63

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Q: 4-18. Neglecting friction, find the ac- celeration of the system of weights shown in Figure P4-18 if…

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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: