Forces and Matter – Online MCQs Test – Physics 9th

1. Which of the following material is more elastic?

Glass

Rubber

Wood

Steel

2. Forces on an object can cause:

Both of these

tensile deformation (stretching)

None of these

compressive deformation (squashing)

3. 1 Pascal (Pa) = :

1.013 × 10⁵ Nm^-2

10 Nm^-2

1Nm^-2

1.013 Nm^-2

4. Pressure = :

force / area

area / force

area / torque

torque / area

5. What is the unit for the spring constant?

Nm^-1

Nm²

Nm^-2

6. 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 ____________

4 Ncm^-2

0.8 Ncm^-2

0.25 Ncm^-2

100 Ncm^-2

7. The spring in brakes and clutches are used:

to absorb shocks

to measure force

to absorb strain energy

to restore original position

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

inelastic

Irreversible

permanent

elastic

9. 1 atmosphere = :

1.013 × 10⁵ Nm^-1

1.013 × 10⁵ Bar

1.013 × 10⁵ Pascal

1.013 × 10⁵ Newton

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

None of these

extension produced

increase in length

force applied

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

liquid machines

fluid machines

pneumatic machines

hydraulic machine

12. 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?

Pressure increases with depth

More water available to flow out the bottom

Pressure decreases with depth

Density of water is different at different place

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

x = kF

F = k/x

F = kx

x = k/F

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

energy

torque

equilibrium

pressure

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

Volume

Weight

Mass

Density

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

expansion

extension

elasticity

stretch

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

large value

constant value

large value and small value

small value

18. In SI system, unit of pressure is:

Nm²

Nm^-2

Nm^-1

19. The pressure in a fluid is greater with:

small depth and low density

large depth and low density

large depth and high density

the small depth and high density

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

large area

round area

cylindrical area

small area

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