Forces and Matter – Online MCQs Test – Physics 9th

1. In SI system, unit of pressure is:

Nm^-1

Nm²

Nm^-2

2. 1 Pascal (Pa) = :

1.013 Nm^-2

1Nm^-2

1.013 × 10⁵ Nm^-2

10 Nm^-2

3. The pressure in a fluid is greater with:

large depth and high density

large depth and low density

small depth and low density

the small depth and high density

4. The spring in brakes and clutches are used:

to absorb shocks

to measure force

to absorb strain energy

to restore original position

5. 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

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

inelastic

elastic

Irreversible

permanent

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

F = kx

x = k/F

F = k/x

x = kF

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

Weight

Volume

Density

Mass

9. Forces on an object can cause:

Both of these

tensile deformation (stretching)

None of these

compressive deformation (squashing)

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

large value and small value

small value

large value

constant value

11. 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 liquid

A gas

12. Which of the following material is more elastic?

Wood

Rubber

Glass

Steel

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

Atmosphere

Bar

Pascal

Newton

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

pressure

torque

equilibrium

energy

15. The pressure exerted by fluids acts in:

one direction

all directions

two directions

up & down directions

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

extension produced

None of these

force applied

increase in length

17. Pressure = :

torque / area

force / area

area / force

area / torque

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

hydraulic machine

fluid machines

pneumatic machines

liquid machines

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 ____________

100 Ncm^-2

0.25 Ncm^-2

4 Ncm^-2

0.8 Ncm^-2

20. What is the unit for the spring constant?

Nm^-1

Nm^-2

Nm²

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