Forces and Matter – Online MCQs Test – Physics 9th

1. 1 Pascal (Pa) = :

1.013 × 10⁵ Nm^-2

1Nm^-2

1.013 Nm^-2

10 Nm^-2

2. 1 atmosphere = :

1.013 × 10⁵ Newton

1.013 × 10⁵ Pascal

1.013 × 10⁵ Nm^-1

1.013 × 10⁵ Bar

3. 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 decreases with depth

Pressure increases with depth

4. The pressure exerted by fluids acts in:

up & down directions

all directions

two directions

one direction

5. Pressure = :

force / area

torque / area

area / torque

area / force

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

stretch

expansion

elasticity

extension

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

Volume

Mass

Weight

Density

8. Which of the following material is more elastic?

Rubber

Glass

Wood

Steel

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

extension produced

None of these

increase in length

force applied

10. A hydraulic machine works on:

Newton’s law of gravitation

Newton’s third law of motion

Molecular theory

Pascal’s law

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

x = k/F

x = kF

F = k/x

F = kx

12. What is the unit for the spring constant?

Nm^-2

Nm^-1

Nm²

13. The spring in brakes and clutches are used:

to absorb strain energy

to measure force

to restore original position

to absorb shocks

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

mass

force

None of them

depth

15. Forces on an object can cause:

compressive deformation (squashing)

Both of these

None of these

tensile deformation (stretching)

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.

A gas

A liquid

A liquid and A gas

None of them

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

Newton

Atmosphere

Pascal

Bar

18. Pressure is greater when a large force acts on:

small area

cylindrical area

round area

large area

19. 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

0.25 Ncm^-2

100 Ncm^-2

4 Ncm^-2

20. In SI system, unit of pressure is:

Nm^-1

Nm^-2

Nm²

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