The coefficient of friction between the two blocks shown in the figure is 
= 0.4 and between the lower block and the ground is zero. The blocks are given velocities of 2 m s -1 and 8 m s -1 respectively in the direction shown in the figure. In how much time (in seconds) the slipping between the blocks will stop?
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(l)
The common velocity of the blocks can be calculated as follows
3v = 1x2 + 2x8
v = 6 m s -1
The acceleration of the 1 kg block is
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