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A 4.00−kg block rests between the floor and a 3.00−kg block as shown in the figure. The 3.00−kg block is tied to a wall by a horizontal rope. If the coefficient of static friction is 0.800 between each pair of surfaces in contact, what horizontal force F must be applied to the 4.00−kg block to make it move? (g = 9.8 m/s2) A) 21.1 N B) 16.2 N C) 78.4 N D) 54.9 N E)23.5 N

A 4.00−kg block rests between the floor and a 3.00−kg block as shown in the figure. The 3.00−kg block is tied to a wall by a horizontal rope. If the coefficient of static friction is 0.800 between each pair of surfaces in contact, what horizontal force F must be applied to the 4.00−kg block to make it move? (g = 9.8 m/s2) A) 21.1 N B) 16.2 N C) 78.4 N D) 54.9 N E)23.5 N

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A 4.00 − k g block rests between the floor and a 3.00 − k g block as shown in the figure. The 3.00 − k g block is tied to a wall by a horizontal rope. If the coefficient of static friction is 0.800 between each pair of surfaces in contact, what horizontal force F must be applied to the 4.00 − k g block to make it move? ( g = 9.8 m / s 2 ) A) 21.1 N B) 16.2 N C) 78.4 N D) 54.9 N E ) 23.5 N

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