Forces and Matter – Online MCQs Test – Physics 9th

1. In SI system, unit of pressure is:

Nm²

Nm^-1

Nm^-2

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

Atmosphere

Bar

Newton

Pascal

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

expansion

stretch

extension

elasticity

4. The pressure in a fluid is greater with:

large depth and low density

the small depth and high density

small depth and low density

large depth and high density

5. 1 atmosphere = :

1.013 × 10⁵ Pascal

1.013 × 10⁵ Newton

1.013 × 10⁵ Bar

1.013 × 10⁵ Nm^-1

6. Which of the following material is more elastic?

Steel

Wood

Glass

Rubber

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

fluid machines

pneumatic machines

liquid machines

hydraulic machine

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

large value

constant value

small value

large value and small value

9. 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 and A gas

None of them

A liquid

A gas

10. Forces on an object can cause:

tensile deformation (stretching)

compressive deformation (squashing)

Both of these

None of these

11. The pressure exerted by fluids acts in:

all directions

one direction

two directions

up & down directions

12. The spring in brakes and clutches are used:

to absorb strain energy

to restore original position

to absorb shocks

to measure force

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

pressure

equilibrium

torque

energy

14. 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

Pressure decreases with depth

More water available to flow out the bottom

Pressure increases with depth

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

F = k/x

F = kx

x = kF

x = k/F

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

extension produced

force applied

None of these

increase in length

17. A hydraulic machine works on:

Molecular theory

Newton’s third law of motion

Newton’s law of gravitation

Pascal’s law

18. Pressure = :

area / force

torque / area

force / area

area / torque

19. 1 Pascal (Pa) = :

10 Nm^-2

1Nm^-2

1.013 Nm^-2

1.013 × 10⁵ Nm^-2

20. What is the unit for the spring constant?

Nm^-2

Nm^-1

Nm²

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