Test: Thrust And Pressure

10 Questions MCQ Test Science Class 9 | Test: Thrust And Pressure

This mock test of Test: Thrust And Pressure for Class 9 helps you for every Class 9 entrance exam. This contains 10 Multiple Choice Questions for Class 9 Test: Thrust And Pressure (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Thrust And Pressure quiz give you a good mix of easy questions and tough questions. Class 9 students definitely take this Test: Thrust And Pressure exercise for a better result in the exam. You can find other Test: Thrust And Pressure extra questions, long questions & short questions for Class 9 on EduRev as well by searching above.

Thrust exerted by an iron cuboid when placed on sand is equal to


If weight of an object is equal or less than upthrust acting on it then object would


The pressure exerted by water (density = 103 kg/m3) on the bottom surface (2m × 4m) of tank having dimensions 2m × 4m × 2m is​


The SI unit of pressure is​


A sharp edge blade is more effective in cutting than a blunt blade due to


For a given applied thrust, pressure exerted on a surface by a sharp pin is


Pressure exerted by a sharp needle on a surface is more than the pressure exerted by a blunt needle.


The neck and bottom of a bottle are 2cm and 20 cm in diameter respectively. The cork is pressed with same pressure. If the cork is pressed with a force of 1.2 kgf on the neck of the bottle, the force exerted on the bottom of the bottle will be


Diameter of the neck is = 2cm = 0.02m
So, the area of the cross section of the neck is, a = Πd² /4 = 0.000314 m²
Diameter of the bottom is = 20cm = 0.2m
So, the area of the cross section of bottom is,  A = Πd² /4 = 0.0314 m²
Force applied to the cork, f = 1.2 kgf
Let F be the force at the bottom, According to pascal’s law  F/A = f/a
⇒ F = (f/a)*A = (1.2/0.000314)*(0.0314) = 120 Kgf


An object exerts a force F on a surface of surface area A. The pressure P acting on the surface is given by


The pressure acting on the surface is given by P = F/A
The force applied os perpendicular to the surface of objects per unit area. Here, P is the pressure, F is the force and A is the area. Pressure is scalar quality and its unit is pa 
(pascal). Thus, the pressure acting on the surface is given by P = F/A. 


To observe and compare the pressure exerted by three different faces of a cuboid on sand, the following Cuboid is available to you:
(A) Wooden cuboid of dimension 20 cm x 30 cm x 50 cm
(B) Aluminium cuboid of dimension 3 cm x 6 cm x 12 cm
(C) Iron cuboid of dimension 5 cm x 10 cm x 15 cm
(D) Iron cuboid of dimension 20 cm x 30 cm x 15 cm
The best choice from the practical point of view would be:

Solution: It will give us a correct measure of high and low pressure on different faces like 20×30 cm will give lowest pressure and 20×15 will give highest pressure and iron has quite large weight so it will be easy for us to determine pressure and collect information.

A rectangular block of wood of dimensions 40cm x 20cm x 10cm is kept on a table top. The pressure is greatest when it is rested on


Mass of the Wooden block, m = 5Kg
Thrust due to wooden block, Mg = 5kg x 9.8 m/s² = 49N

(a)    Surface area of 20 Cm x 10 Cm surface ,
A = (20 x 10) cm² = (0.2 x 0.1) m² = 0.02 m²
P = mg / A = 49 N / 0.02 m² = 49/0.02 N/m²  
Or Pressure, P = 2450 N/m²

(b)   Surface area of  40 cm x 20 cm surface,
A = ( 40 x 20) cm² = ( 0.4 x 0.2 ) m² = 0.08 m²
P = mg / A = 49 N / 0.08 m² = 49/0.08 N/m²
Or Pressure, P = 612.5 N/m²

Similar Content

Related tests