Ac cording to Pascal's law, the increases in pressure at one point f enclosed liquid in equilibrium of rest is transmitted equally to all other points of the liquid and also to the walls of the container, provided the effect of gravity is neglected. Hydraulic lift and hydraulic brakes are based on this very law. Read the above passage and anser the following question : (i) How do hydraulic brakes work ? (ii) What are the implication of this law in day to day life ?

Explanation

Ac cording to Pascal's law, under given conditions, change in pressure is transmitted equally, i.e., `P_1 = P_2 or (F_1)/(q_1) = (F_2)/(a_2) or F_2 = (a_2)/(a_1) xx F_1` if `a_2 gt gt a_1` , then `F_2 gt gt F_1` i.e., a gentle push `(F_1)` on the brake pedal result in a mch larger force `F_2` on the wheels which stops the wheels. This is how hydraulic brakes work. (ii) In day to day life, we find the a small effort by an indicidual, when spread over masses (larges number of people), becomes a much larger force to reckon with. For any movement to be suc cessful its base should be as large as possible.