MCQ Thrust and Pressure Chapter 10 Class 9 Science

MCQ’s For All Chapters – Science Class 9th

1. There will be total 14 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 14

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 14

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 14

4. The SI unit of pressure is

N

N m^-1

Pa

N m²

Question 4 of 14

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 14

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 14

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 14

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 14

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

C

D

Question 9 of 14

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 14

11. Assertion-A stone which tied with rope accelerate from the motion.

Reason- A stone which travelling in circular path which follows centripetal force.

a) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c) Assertion is true but Reason is false.

d) Both Assertion and Reason are false.

Question 11 of 14

12. Assertion- The force that causes the acceleration and keeps the body moving along the circular path is acting towards the center. This force is called centripetal force

Reason-Centripetal force only acting on such an object which capable to move alone in the space.

a) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c) Assertion is true but Reason is false.

d) Both Assertion and Reason are false.

Question 12 of 14

13. Assertion : A man is sitting in a boat which floats on a pond. If the man drinks some water from the pond, the level of water in the pond will decrease.
Reason : The weight of the liquid displaced by the body is greater than the weight of the body.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true.

Question 13 of 14

14. Assertion : Any two objects in the universe attract each other by a force called gravitational force.
Reason : The force of gravitation exerted by the earth is called gravity.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true.

Question 14 of 14

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