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Question

The area of cross section of press plunger of hydraulic press is 4m2. It is required to overcome a resistive load of 400N on it.If the area of cross section of pump plunger is 0.01m2 then force required on pump plunger is


A

0.1N

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B

10N

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C

1N

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D

100N

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Solution

The correct option is C

1N


Area of cross section of pump plunger A1 = 0.01 m2, Area of cross section of press plunger A2 = 4 m2, Resistive force of press plunger F2=400 N and Force required on pump plunger =F1

According to Pascal law

F1A1=F2A2F1F2=A1A2F1400=0.014F1=1 Newton


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