Forces and Matter – Online MCQs Test – Physics 9th

1. Which of the following material is more elastic?

Rubber

Wood

Steel

Glass

2. If a metal block applies a force of 20N on an area of 5cm². Find the pressure being applied by the block on the area of ____________

100 Ncm^-2

0.8 Ncm^-2

0.25 Ncm^-2

4 Ncm^-2

3. Pressure = :

torque / area

area / force

area / torque

force / area

4. The length of spring increases as the force increases. This increase in length of spring is known as:

elasticity

expansion

extension

stretch

5. In SI system, unit of pressure is:

Nm^-1

Nm^-2

Nm²

6. 1 atmosphere = :

1.013 × 10⁵ Bar

1.013 × 10⁵ Nm^-1

1.013 × 10⁵ Pascal

1.013 × 10⁵ Newton

7. The equation for Hooke’s law may by written as:

x = k/F

x = kF

F = k/x

F = kx

8. 1 Pascal (Pa) = :

1.013 Nm^-2

1Nm^-2

1.013 × 10⁵ Nm^-2

10 Nm^-2

9. The pressure in a fluid is greater with:

large depth and high density

small depth and low density

the small depth and high density

large depth and low density

10. Within elastic limit, the displacement produced in the spring is directly proportional to the:

None of these

extension produced

increase in length

force applied

11. Which of the following is not a unit of pressure?

Atmosphere

Pascal

Bar

Newton

12. The given figure shows a container with three spouts. The container is filled with water. Jets of water pour out of the spouts. Why does the jet of water from the bottom spout go farthest out from the container?

More water available to flow out the bottom

Pressure decreases with depth

Pressure increases with depth

Density of water is different at different place

13. When a force is exerted on an area, this is known as:

pressure

energy

torque

equilibrium

14. If the material recovers the original dimension, when an external force is removed, this deformation is known as deformation.

permanent

Irreversible

inelastic

elastic

15. What is the unit for the spring constant?

Nm^-1

Nm^-2

Nm²

16. A hydraulic machine works on:

Newton’s third law of motion

Pascal’s law

Newton’s law of gravitation

Molecular theory

17. The machines in which force is transmitted by liquids under pressure is known as:

pneumatic machines

hydraulic machine

fluid machines

liquid machines

18. If a spring stretches easily then its spring constant has ____________

constant value

small value

large value and small value

large value

19. It is a collection of molecules that are randomly arranged and held together by weak cohesive forces and by forces exerted by the walls of a container.

A gas

None of them

A liquid and A gas

A liquid

20. Pressure of a fluid P is proportional to the:

force

None of them

depth

mass

Class 9th | Physics | Chapter 5 | Forces and Matter | Online MCQs Test