The three blocks in figure-2.25 are released from rest and accelerate at the rate of `5m//s^(2)`. If M = 4kg, what is the magnitude of the frictional force on the block that slides horizontally?

[140 N]

When the three blocks of masses M, 2M and 2M in the system are released from rest, they accelerate with a magnitude of 1 m/ s^(2) . What is the coefficient of kinetic friction between block on the table and the table top? (neglect the force of friction in the pulleys and take g =10 m/ s^(2) )

On the horizontal surface of a truck (mu=0.6) a block of mass 1 kg is placed. If the truck is accelerating at the rate of 5m//sec^(2) then friction force on the block will be

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A 3.5 kg block is pushed along a horizontal floor by a force vecF of magnitude 15 N at an angle theta = 40^(@) with the horizontal (Fig. 6-33). The coefficient of kinetic friction between the block and the floor is 0.25. Calculate the magnitudes of (a) the frictional force on the block from the floor and (b) the block's acceleration.

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Three blocks A , B and C , whose masses are 9kg , 9kg and 18kg respectively as shown in the figure, are released from rest. The co-efficient of friction between block A and the horizontal surface is 0.5 & the co-efficient of friction between block B and the horizontal surface is 0.5 . Find the acceleration of block C just release [Take g=10m//s^(2) ]. All strings and pulleys are ideal

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A block of mass 0.1 kg is held against a wall by applying a horizontal force of 5 N on the block. If the coefficient of friction between the block and the wall is 0.5, then the magnitude of the frictional force acting on the block is