These are the numericals in physics of chapter - pressure

Q1)what force will exert a pressure of 50000 pascals on an area of 0.5 meter square ?
Q2)find out the area of a body which experiences a pressure of 500 pascals by a force of 100 N
Q3)calculate the pressure exerted by a force of 300N(newton) acting on an area of 30cm square
Q4)what will be force required to exert a pressure of 20000 pascal on an area of 1 cm square ?

so these are the questions to be answered ... referring to the answers you can give the solutions :) plzzzz help me out with this its urgent . it is to be submitted by tomorrow itself!!!
Answers for the above questions are :(Q1) 25000N (Q2) 0.2 meter square (Q3) 10 N cm-square = 100,000 pascal (Q4) 2 N

1

Answers

2014-11-05T22:44:20+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Pressure is defined as the force exerted (on a surface) per unit surface area.   Pressure is a scalar. 

P = F / A,      Its unit is Pascal = Newton / meter².   There are also some other units in use for pressure.

1)   F = P * A = 50, 000 Pascals * 0.5 meter =  25, 000 Pascals or N/m²

2)  Surface Area A = Force / Pressure = 100 N / 500 pa  = 1/5 m² 

3)  Area = 30 cm² = 30 / (100*100)  meter²

     Pressure = F / A = 300 N / (3/1000) = 100 * 1000 pa  = 1 * 10⁵ pa

4 )  Area =  1 cm² = (1/100)² meter²
        Force needed = P A  = 20, 000 pa * (1/100²) m²  =  2 Newtons


2 2 2
thanks
I too have given the same answer
you have written F = ma .. that formula is different
i did not say your calculations were wrong. i asked for correction of the formula. but u did not do. if u want write answer again please