if force exerted by fluid per unit surface area of contact is 0.9N/m^2 find out value of pressure in the pascal
Answers
the the word Energy is very often used in our daily life but in science we give it a definite and precise meaning. let's consider the following examples : fast moving Cricket ball hits a stationary wicket the wicket is thrown away. similarly, an object when raised to a certain height gets the capability to do work. you must have seen that when a raised hamara falls on a nail placed on a piece of wood, it drives the nail into the wood . we have also observed children vending a toy and when the toy is placed on the floor it starts moving . water balloon is filled with air and we press set we notice a change in its shape. as long as we press it gently it can come back to its original shape when the force is withdrawn. however, if we press the balloon hard, it can even explode producing a blastic sound. in all these examples, the object acquire, through different means, the capability of doing work. an object having a capability to do work is said to possess energy. the object which does the work loses energy and the object on which the work is done gains energy .
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