Question

The area of one end of a U-tube is 0.01 square metre and that other end is 1 square metre .When a force was applied on the liquid at the first end,the force experienced at the other end was4000N.What was the force applied on the liquid at the first end? *
2 points
400 N
40 N
4000 N
4 N​

Answer 1

We know that pressure remains same if the heights are same

A1 = 0.01 sq m

A2 = 1 sq m

F2 = 4000 N

P1 = P2

F1 / A1 = F2 / A2

F1 / 0.01 = 4000 / 1

F1 = 4000 × 0.01

F1 = 40 N

( B ) 40 N is the correct answer.