Apiston above a liquid in a closed container has an area of 1m2. the piston carries a load of 350 kg. what will be the external pressure on the upper surface of the liquid? a. 4.90 kpa b. 27.3 kpa c. 68.6 kpa d. 3.43 kpa

Explanation :

It is given that,

Area of the container,

Load carried by piston, m = 350 kg

Pressure on the upper surface of the liquid is defined as the force acting per unit area.

Mathematically it can be written as :

From Newton's second law of motion :

F = m a

So,  

P = 3430 Pa ( Pa = pascal)

or

P = 3.43 kPa

So, the correct option is (D)

Hence, this is the required solution.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

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