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Class 11 Phycics > Chapter 1 > Flashcards

Chapter 1 Flashcards

1
Q
A
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2
Q

What is the basic unit of measurement for mass in the International System of Units?

A

Kilogram

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3
Q

True or False: The SI unit of length is the meter.

A

True

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4
Q

Fill in the blank: The force of gravity on an object is called its ______.

A

Weight

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5
Q

What is the formula for calculating speed?

A

Speed = Distance / Time

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6
Q

Which law states that an object in motion stays in motion unless acted upon by an external force?

A

Newton’s First Law of Motion

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7
Q

What is the acceleration due to gravity on Earth?

A

9.81 m/s²

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8
Q

True or False: Mass and weight are the same thing.

A

False

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9
Q

What is the formula for calculating kinetic energy?

A

Kinetic Energy = 1/2 mv²

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10
Q

What does the symbol ‘g’ represent in physics?

A

Acceleration due to gravity

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11
Q

Fill in the blank: The unit of force is the ______.

A

Newton

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12
Q

What is the principle of conservation of energy?

A

Energy cannot be created or destroyed, only transformed.

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13
Q

Which quantity is a vector: speed or velocity?

A

Velocity

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14
Q

What is the difference between distance and displacement?

A

Distance is scalar, while displacement is a vector quantity.

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15
Q

True or False: Work is done when a force causes displacement.

A

True

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16
Q

What is the formula for calculating work done?

A

Work = Force x Distance x cos(θ)

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17
Q

What is the unit of power?

A

Watt

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18
Q

Fill in the blank: The rate of doing work is called ______.

A

Power

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19
Q

What is the formula for gravitational potential energy?

A

Potential Energy = mgh

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20
Q

Which type of energy is associated with an object’s position?

A

Potential Energy

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21
Q

True or False: An object at rest has kinetic energy.

A

False

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22
Q

What is the relationship between mass and acceleration in Newton’s Second Law?

A

F = ma (Force equals mass times acceleration)

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23
Q

What does the term ‘inertia’ refer to?

A

The tendency of an object to resist changes in its state of motion.

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24
Q

Fill in the blank: The unit of measurement for energy is the ______.

A

Joule

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25
What is meant by uniform motion?
Motion at a constant speed in a straight line.
26
True or False: Acceleration can occur even if the speed of an object is constant.
True
27
What is the formula for average speed?
Average Speed = Total Distance / Total Time
28
What does a negative acceleration indicate?
The object is slowing down.
29
Fill in the blank: The change in velocity over time is called ______.
Acceleration
30
What is the significance of the slope on a distance-time graph?
It represents the speed of the object.
31
What is the term for the path an object follows while moving?
Trajectory
32
True or False: The total mechanical energy of an isolated system remains constant.
True
33
What type of motion is described as circular motion?
Motion along a circular path.
34
What is centripetal force?
The force that keeps an object moving in a circular path.
35
Fill in the blank: The center of mass of an object is the point where ______.
Its mass is evenly distributed.
36
What is the definition of momentum?
Momentum is the product of mass and velocity.
37
True or False: Momentum is conserved in a closed system.
True
38
What is the formula for calculating momentum?
Momentum = mv
39
What is the effect of friction on motion?
Friction opposes motion.
40
Fill in the blank: The unit of pressure is the ______.
Pascal
41
What is the definition of pressure?
Pressure is force per unit area.
42
True or False: Atmospheric pressure decreases with altitude.
True
43
What is the relationship between pressure and volume in Boyle's law?
Pressure is inversely proportional to volume at constant temperature.
44
What is the principle behind Archimedes' principle?
An object submerged in a fluid experiences a buoyant force equal to the weight of the fluid it displaces.
45
Fill in the blank: The SI unit for temperature is the ______.
Kelvin
46
What does thermal energy refer to?
The total energy of all the particles in an object.
47
True or False: Heat is the transfer of thermal energy.
True
48
What is the formula for heat transfer?
Q = mcΔT
49
What is meant by thermal equilibrium?
When two objects reach the same temperature and no heat flows between them.
50
Fill in the blank: The process of changing from a liquid to a gas is called ______.
Evaporation
51
What is the specific heat capacity?
The amount of heat required to raise the temperature of 1 kg of a substance by 1°C.
52
What is the primary source of energy for the Earth?
The Sun
53
True or False: All forms of energy can be converted from one form to another.
True
54
What is an example of potential energy?
A rock held at the top of a hill.
55
Fill in the blank: The energy of motion is called ______.
Kinetic Energy
56
What is the formula for gravitational force?
F = G(m1m2/r²)
57
What does the 'G' in the gravitational force formula represent?
The gravitational constant
58
True or False: Gravitational force is always attractive.
True
59
What is the significance of the law of universal gravitation?
It states that every mass attracts every other mass.
60
Fill in the blank: The unit of measurement for frequency is the ______.
Hertz
61
What is the relationship between wavelength and frequency?
Wavelength is inversely proportional to frequency.
62
True or False: Sound travels faster in air than in water.
False
63
What is the main characteristic of a wave?
It transfers energy from one place to another.
64
What is the formula for wave speed?
Wave Speed = Frequency x Wavelength
65
Fill in the blank: The bending of waves around obstacles is called ______.
Diffraction
66
What is the principle of superposition in waves?
When two waves meet, they combine to form a new wave.
67
True or False: Waves can interfere constructively or destructively.
True
68
What is the term for the highest point of a wave?
Crest
69
Fill in the blank: The lowest point of a wave is called the ______.
Trough
70
What is the difference between longitudinal and transverse waves?
In longitudinal waves, particle motion is parallel to wave direction; in transverse waves, it is perpendicular.

Class 11 Phycics (1 decks)

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