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.

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5