5.79 •• Block A in Fig. P5.79 weighs 1.20 N, and block B weighs 3.60 N. The coefficient of kinetic friction between all surfaces is 0.300. Find the magnitude of the horizontal force F necessary to drag block

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5.79 •• Block A in Fig. P5.79 weighs 1.20 N, and block B weighs
3.60 N. The coefficient of kinetic friction between all surfaces is 0.300.
Find the magnitude of the horizontal force F necessary to drag block
Figure P5.79
(a)
(b)
A
A
F
В
В
B to the left at constant speed (a) if A rests on B and moves with it
(Fig. P5.79a), (b) if A is held at rest (Fig. P5.79b).
Transcribed Image Text:5.79 •• Block A in Fig. P5.79 weighs 1.20 N, and block B weighs 3.60 N. The coefficient of kinetic friction between all surfaces is 0.300. Find the magnitude of the horizontal force F necessary to drag block Figure P5.79 (a) (b) A A F В В B to the left at constant speed (a) if A rests on B and moves with it (Fig. P5.79a), (b) if A is held at rest (Fig. P5.79b).
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