Question

Block A has a mass of 4.20 kg and block B has a mass of 2.30 kg. The coefficient of kinetic friction between B and the horizontal plane is 0.47. The inclined plane is frictionless. Find (a) the acceleration of the blocks and (b) the tension in the string passing over the massless, frictionless pulley shown in the figure. 

          Block A has a mass of 4.20 kg and block B has a mass of 2.30 kg. The coefficient of kinetic friction between B and the horizontal plane is 0.47. The inclined plane is frictionless. Find
(a) the acceleration of the blocks and (b) the tension in the string passing over the massless, frictionless pulley shown in the figure.
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Block A has a mass of 4.20 kg and block B has a mass of 2.30 kg. The coefficient of kinetic friction between B and the horizontal plane is 0.47. The inclined plane is frictionless. Find (a) the acceleration of the blocks and (b) the tension in the string passing over the massless, frictionless pulley shown in the figure.

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University Physics with Modern Physics
University Physics with Modern Physics
Hugh D. Young 14th Edition
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Block A has a mass of 4.20 kg and block B has a mass of 2.30 kg. The coefficient of kinetic friction between block B and the horizontal plane is 0.47. The inclined plane is frictionless. Find (a) the acceleration of the blocks and (b) the tension in the string passing over the massless, frictionless pulley shown in the figure.
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Block A in the figure has mass mA = 4.20 kg, and block B has mass mB = 2.30 kg. The coefficient of kinetic friction between block B and the horizontal plane is μ_k = 0.540. The inclined plane is frictionless and at an angle of 31.02°. The pulley serves only to change the direction of the cord connecting the blocks. The cord has negligible mass. Find (a) the tension in the cord and (b) the magnitude of the acceleration of the blocks.

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Timothy J.
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Transcript

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00:01 Hello, here, block a is connected to block b and mass of block a is 4 .20 kilograms.
00:06 Mass of block b is 2 .30 kilograms.
00:09 Inclined is frictionless and the horizontal surface has a coefficient of friction with 0 .47.
00:16 First, we have to find accelerations as blocks.
00:20 Let's do this.
00:21 Let's sketch the forces acting on each block.
00:43 And now, let's presume that acceleration a is directed.
00:48 Downwards.
01:46 Now let's complete this calculation...
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