There is friction between the block and the table.
The suspended 4 kg mass on the left is moving up, the 3 kg mass slides to the right on the table, and the suspended mass 8 kg on the right is moving down. The acceleration of gravity is 9.8 m/s/s.
I originally calculated force of friction, the the weight of the other two blocks, found the net force, and divided it by the total mass of the system, and got 7.56 m/s/s, but it was wrong. What am i doing wrong?
The suspended 4 kg mass on the left is moving up, the 3 kg mass slides to the right on the table, and the suspended mass 8 kg on the right is moving down. The acceleration of gravity is 9.8 m/s/s.
I originally calculated force of friction, the the weight of the other two blocks, found the net force, and divided it by the total mass of the system, and got 7.56 m/s/s, but it was wrong. What am i doing wrong?
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As a net effect, (8-4)g = 4*g = 39.2 N force is pulling all the masses ( 8+4+3)= 15 kg to the right.
There is an opposing frictional force = μ*3*g= 29.4 μ N
Net force acting on the masses is 39.2 - 29.4 μ
Hence the acceleration is
a = [39.2 - 29.4 μ ] / 15 = (2.613 – 1.960* μ)
Substitute the value of μ and find the answer.
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There is an opposing frictional force = μ*3*g= 29.4 μ N
Net force acting on the masses is 39.2 - 29.4 μ
Hence the acceleration is
a = [39.2 - 29.4 μ ] / 15 = (2.613 – 1.960* μ)
Substitute the value of μ and find the answer.
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