Forces and Matter – Online MCQs Test – Physics 9th

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

stretch

extension

elasticity

expansion

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 ____________

0.8 Ncm^-2

100 Ncm^-2

4 Ncm^-2

0.25 Ncm^-2

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

x = kF

x = k/F

F = k/x

F = kx

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

Pascal

Bar

Newton

Atmosphere

5. Forces on an object can cause:

compressive deformation (squashing)

tensile deformation (stretching)

Both of these

None of these

6. In SI system, unit of pressure is:

Nm^-1

Nm^-2

Nm²

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

None of them

depth

force

mass

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

large value

small value

large value and small value

constant value

9. Which of the following material is more elastic?

Glass

Steel

Wood

Rubber

10. A hydraulic machine works on:

Molecular theory

Newton’s third law of motion

Newton’s law of gravitation

Pascal’s law

11. 1 atmosphere = :

1.013 × 10⁵ Newton

1.013 × 10⁵ Pascal

1.013 × 10⁵ Bar

1.013 × 10⁵ Nm^-1

12. The spring in brakes and clutches are used:

to restore original position

to absorb strain energy

to measure force

to absorb shocks

13. 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?

Density of water is different at different place

More water available to flow out the bottom

Pressure increases with depth

Pressure decreases with depth

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

increase in length

extension produced

force applied

None of these

15. What is the unit for the spring constant?

Nm^-1

Nm^-2

Nm²

16. The pressure in a fluid is greater with:

small depth and low density

the small depth and high density

large depth and low density

large depth and high density

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

torque

pressure

equilibrium

energy

18. 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 liquid

A liquid and A gas

None of them

A gas

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

Volume

Mass

Density

Weight

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

elastic

inelastic

Irreversible

permanent

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