Thrust and Pressure, Class 9 Science

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

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

  mass of cuboid

 mass per unit surface area

  weight of cuboid

 weight per unit surface area

Question 1 of 10

2. A glass cuboidal has dimensions 10gm × 10 cm 4 × cm. it is kept with its perfect face (10 cm × 10 cm) in contact with the table. if is lifted and allowed to rest on the table with its smaller surface (10 cm × 4 cm) in contact with the table the pressure exerted will

  remain unchanged

 decrease

 increase

 may increase or decrease depending on the shape of table.

Question 2 of 10

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

 2.96 × 10⁵ Pa

 1.96 × 10⁵ Pa

 1.80 × 10⁴ Pa

 1.96 × 10⁴ Pa

Question 3 of 10

4. The SI unit of pressure is

  N

 N m^-1

 Pa

 N m²

Question 4 of 10

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

 Low force

  Low pressure

 Large contact area

 Small contact area

Question 5 of 10

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

 more than the pressure exerted by a blunt pin.

 less than the pressure exerted by a blunt pin.

 equal to the pressure exerted by a blunt pin.

 either less or equal to the pressure exerted by a blunt pin.

Question 6 of 10

7. 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:

 1200 kgf

 120 kgf

 1.2 kgf

 12 kgf

Question 7 of 10

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

  P = FA

 P = F/A

 P = F/A²

 P = A/F

Question 8 of 10

9. 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:

 A

 B

 D

 C

Question 9 of 10

10. 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

 equal for all cases

 20cm x 10 cm

 40cm x 10cm

 40cm x 20cm

Question 10 of 10

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