Q.

A hydraulic press can lift 100 kg when a mass ‘m’ is placed on the smaller piston. It can lift _______×104 kg when the diameter of the larger piston is increased by 4 times and that of the smaller piston is decreased by 4 times keeping the same mass ‘m’ on the smaller piston.

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answer is 2.56.

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Detailed Solution

Using Pascal's Law, same Pressure is transmitted .F1A1=F2A2 Initially,  100gA1=mgA2.(i)here, A1 is area of larger piston , which will become 16A1 andA2 is area of smaller piston, which will become A216 Finally,  Mg16A1=mgA216(ii)100×16M=116M=25600kg

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A hydraulic press can lift 100 kg when a mass ‘m’ is placed on the smaller piston. It can lift _______×104 kg when the diameter of the larger piston is increased by 4 times and that of the smaller piston is decreased by 4 times keeping the same mass ‘m’ on the smaller piston.