Forces and Matter – Online MCQs Test – Physics 9th

1. What is the unit for the spring constant?

Nm^-1

Nm^-2

Nm²

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

elasticity

stretch

expansion

extension

3. Which of the following material is more elastic?

Glass

Steel

Rubber

Wood

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

small area

round area

large area

cylindrical area

5. A hydraulic machine works on:

Pascal’s law

Newton’s third law of motion

Molecular theory

Newton’s law of gravitation

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

mass

force

depth

None of them

7. In SI system, unit of pressure is:

Nm²

Nm^-2

Nm^-1

8. 1 atmosphere = :

1.013 × 10⁵ Nm^-1

1.013 × 10⁵ Newton

1.013 × 10⁵ Pascal

1.013 × 10⁵ Bar

9. 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

10. 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

11. 1 Pascal (Pa) = :

10 Nm^-2

1.013 × 10⁵ Nm^-2

1.013 Nm^-2

1Nm^-2

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

Volume

Density

Mass

Weight

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

small value

constant value

large value

large value and small value

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?

Pressure decreases with depth

More water available to flow out the bottom

Density of water is different at different place

Pressure increases with depth

15. The spring in brakes and clutches are used:

to absorb shocks

to measure force

to absorb strain energy

to restore original position

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

Pascal

Atmosphere

Bar

Newton

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

energy

torque

pressure

equilibrium

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

liquid machines

hydraulic machine

fluid machines

pneumatic machines

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

x = k/F

x = kF

F = kx

F = k/x

20. Forces on an object can cause:

Both of these

None of these

tensile deformation (stretching)

compressive deformation (squashing)

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