Q1. A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a mass of 1000kg. The force required on plunger is nearly equal to
Q1. A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a mass of 1000kg. The force required on plunger is nearly equal to (a) 100N (b) 1000N (C) 10000N (d) 10N Ans (a) By pascal law: F1/A1 = F2/A2 F1/3.14(1.5)^2/4 = 1000×10/3.14(15)^2/4 F1 = 100N...................................................................................................(Ans) *3.14 is value of pi π *F2= 1000×10= m×g= mass×acceleration due to gravity(9.8) *A1= 3.14(1.5)^2/4 = πd 2 /4 = area of circle *A2= 3.14(15)^2/4 = πd 2 /4 *15 cm diameter value of circle at point2 *1.5 cm diameter value of circle at point1