Physics-
General
Easy
Question
A block of mass m, lying on a rough horizontal plane is acted upon by a horizontal force P and another force Q, inclined at an angle 
to vertical. The block will remain in equilibrium, if coefficient of friction between it and surface is
The correct answer is:
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Block A of mass m rests on the plank B of mass 3m which is free to slide on a frictionless horizontal surface. The coefficient of friction between the block and plank is 0.2. If a horizontal force of magnitude 2mg is applied to the plank B, the acceleration of A relative to the plank and relative to the ground respectively, are:
Block A of mass m rests on the plank B of mass 3m which is free to slide on a frictionless horizontal surface. The coefficient of friction between the block and plank is 0.2. If a horizontal force of magnitude 2mg is applied to the plank B, the acceleration of A relative to the plank and relative to the ground respectively, are:
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A block of mass 
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The blocks A and B shown in the figure have masses 
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Three identical blocks are suspended on two identical springs one below the other as shown in figure. If thread is cut that supports block 1 , then initially (choose one alternative only):
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In the arrangements shown, the pulleys, strings and springs are weightless and the systems can move freely without friction. The extension of spring in figure 1 is 
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A particle of mass is acted on by two forces of equal magnitude F maintaining their orientation relative to the velocity 
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3) 
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2)
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