Forces and Matter – Online MCQs Test – Physics 9th

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

extension produced

increase in length

None of these

force applied

2. What is the unit for the spring constant?

Nm^-1

Nm^-2

Nm²

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

permanent

Irreversible

elastic

inelastic

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

expansion

elasticity

extension

stretch

5. The spring in brakes and clutches are used:

to absorb shocks

to restore original position

to measure force

to absorb strain energy

6. The pressure exerted by fluids acts in:

two directions

up & down directions

all directions

one direction

7. 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 increases with depth

Density of water is different at different place

Pressure decreases with depth

8. A hydraulic machine works on:

Newton’s third law of motion

Molecular theory

Newton’s law of gravitation

Pascal’s law

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

mass

None of them

force

depth

10. It tells us how tightly matter is packed together.

Volume

Mass

Weight

Density

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

large value

small value

constant value

large value and small value

12. The pressure in a fluid is greater with:

the small depth and high density

large depth and low density

small depth and low density

large depth and high density

13. 1 Pascal (Pa) = :

1.013 × 10⁵ Nm^-2

1Nm^-2

10 Nm^-2

1.013 Nm^-2

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

F = k/x

x = k/F

x = kF

F = kx

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

pressure

equilibrium

torque

energy

16. 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.

None of them

A liquid and A gas

A gas

A liquid

17. 1 atmosphere = :

1.013 × 10⁵ Newton

1.013 × 10⁵ Pascal

1.013 × 10⁵ Bar

1.013 × 10⁵ Nm^-1

18. In SI system, unit of pressure is:

Nm^-2

Nm²

Nm^-1

19. Which of the following material is more elastic?

Wood

Glass

Rubber

Steel

20. Forces on an object can cause:

None of these

compressive deformation (squashing)

Both of these

tensile deformation (stretching)

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