The lower block in the figure is pulled on by a rope with a tension force of 20
ID: 2135384 • Letter: T
Question
The lower block in the figure is pulled on by a rope with a tension force of 20 N. The coefficient of kinetic friction between the lower block and the surface is 0.27. The coefficient of kinetic friction between the lower block and the upper block is also 0.27.
What is the acceleration of the 2.0 kg block?
PLEASE SHOW STEPS
The lower block in the figure is pulled on by a rope with a tension force of 20 N. The coefficient of kinetic friction between the lower block and the surface is 0.27. The coefficient of kinetic friction between the lower block and the upper block is also 0.27. What is the acceleration of the 2.0 kg block? PLEASE SHOW STEPSExplanation / Answer
max. friction can act on block 2 by surface = 0.27 x 2g =5.29 N
by block 1 = 0.27 x 1 xg = 2.65 N
on block 2 :
20 - T - 5.29 - 2.65 = 2a
T - 2.65 = 1a
add them
20 - 5.29 - 2x2.65 = 3a
a = 3.14 m/s2
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