Forces and Matter – Online MCQs Test – Physics 9th

1. The spring in brakes and clutches are used:

to absorb shocks

to measure force

to restore original position

to absorb strain energy

2. In SI system, unit of pressure is:

Nm²

Nm^-1

Nm^-2

3. The pressure in a fluid is greater with:

large depth and low density

small depth and low density

the small depth and high density

large depth and high density

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

depth

force

mass

None of them

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

stretch

elasticity

expansion

extension

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

fluid machines

pneumatic machines

hydraulic machine

liquid machines

7. 1 atmosphere = :

1.013 × 10⁵ Pascal

1.013 × 10⁵ Nm^-1

1.013 × 10⁵ Newton

1.013 × 10⁵ Bar

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

cylindrical area

round area

small area

large area

9. What is the unit for the spring constant?

Nm^-1

Nm²

Nm^-2

10. 1 Pascal (Pa) = :

1Nm^-2

1.013 Nm^-2

1.013 × 10⁵ Nm^-2

10 Nm^-2

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

F = k/x

F = kx

x = kF

x = k/F

12. Forces on an object can cause:

Both of these

tensile deformation (stretching)

compressive deformation (squashing)

None of these

13. 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 and A gas

A liquid

None of them

14. The pressure exerted by fluids acts in:

all directions

up & down directions

one direction

two directions

15. 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 increases with depth

More water available to flow out the bottom

Pressure decreases with depth

16. 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

4 Ncm^-2

0.25 Ncm^-2

0.8 Ncm^-2

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

energy

equilibrium

torque

pressure

18. Pressure = :

torque / area

area / force

area / torque

force / area

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

large value

constant value

large value and small value

small value

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

Density

Mass

Volume

Weight

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