Physics (50 Cards)

Question 1

What is Newton’s First Law of Motion?

Answer 1

Newton’s First Law states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by an external force.

Question 2

What is the formula for force?

Answer 2

Force = mass × acceleration (F = ma)

Question 3

What is the unit of force in the SI system?

Answer 3

Newton (N)

Question 4

What does Newton’s Second Law describe?

Answer 4

The relationship between force, mass, and acceleration (F = ma)

Question 5

What is Newton’s Third Law?

Answer 5

For every action, there is an equal and opposite reaction.

Question 6

What is the formula for kinetic energy?

Answer 6

KE = ½mv²

Question 7

What is the formula for potential energy?

Answer 7

PE = mgh (mass × gravity × height)

Question 8

What is the unit of energy?

Answer 8

Joule (J)

Question 9

What is power in physics?

Answer 9

The rate at which work is done or energy is transferred.

Question 10

What is the formula for power?

Answer 10

Power = Work / Time or P = W / t

Question 11

What is the unit of power?

Answer 11

Watt (W)

Question 12

What is the acceleration due to gravity on Earth?

Answer 12

9.8 m/s²

Question 13

What is the formula for work?

Answer 13

Work = Force × Distance

Question 14

What is the unit of work?

Answer 14

Joule (J)

Question 15

What is the formula for momentum?

Answer 15

Momentum = mass × velocity (p = mv)

Question 16

What is the law of conservation of momentum?

Answer 16

Total momentum before collision = total momentum after collision (if no external force)

Question 17

What is friction?

Answer 17

A force that opposes motion between two surfaces.

Question 18

What are the types of friction?

Answer 18

Static, sliding (kinetic), rolling, and fluid.

Question 19

What is velocity?

Answer 19

Speed in a given direction.

Question 20

What is acceleration?

Answer 20

The rate of change of velocity over time.

Question 21

What is displacement?

Answer 21

The change in position of an object.

Question 22

What is the difference between scalar and vector quantities?

Answer 22

Scalars have magnitude only; vectors have magnitude and direction.

Question 23

What is density?

Answer 23

Mass per unit volume (ρ = m/V)

Question 24

What is the unit of density?

Answer 24

kg/m³ or g/cm³

Question 25

What is Archimedes’ Principle?

Answer 25

An object submerged in fluid experiences an upward buoyant force equal to the weight of the fluid it displaces.

Question 26

What is pressure?

Answer 26

Force per unit area (P = F/A)

Question 27

What is the unit of pressure?

Answer 27

Pascal (Pa)

Question 28

What is the ideal gas law?

Answer 28

PV = nRT

Question 29

What is temperature measured in SI units?

Answer 29

Kelvin (K)

Question 30

What is Ohm’s Law?

Answer 30

V = IR (voltage = current × resistance)

Question 31

What is the unit of electric current?

Answer 31

Ampere (A)

Question 32

What is the unit of resistance?

Answer 32

Ohm (Ω)

Question 33

What is the unit of electric charge?

Answer 33

Coulomb (C)

Question 34

What is the formula for wave speed?

Answer 34

Speed = frequency × wavelength (v = fλ)

Question 35

What is frequency?

Answer 35

Number of waves that pass a point in one second (measured in Hertz)

Question 36

What is refraction?

Answer 36

The bending of light as it passes from one medium to another.

Question 37

What is reflection?

Answer 37

When a wave bounces off a surface it cannot pass through.

Question 38

What is the Doppler Effect?

Answer 38

Apparent change in frequency due to motion of source or observer.

Question 39

What is a transverse wave?

Answer 39

A wave in which particles move perpendicular to wave direction.

Question 40

What is a longitudinal wave?

Answer 40

A wave in which particles move parallel to wave direction.

Question 41

What is thermal energy?

Answer 41

Energy from the motion of particles in a substance.

Question 42

What is conduction?

Answer 42

Transfer of heat through direct contact.

Question 43

What is convection?

Answer 43

Transfer of heat through fluid movement.

Question 44

What is radiation (in terms of heat transfer)?

Answer 44

Transfer of heat through electromagnetic waves.

Question 45

What is specific heat capacity?

Answer 45

Amount of heat needed to raise the temperature of 1 kg of substance by 1°C.

Question 46

What is the law of conservation of energy?

Answer 46

Energy cannot be created or destroyed, only transformed.

Question 47

What is centripetal force?

Answer 47

Force that keeps an object moving in a circular path.

Question 48

What is torque?

Answer 48

A measure of how much a force acting on an object causes it to rotate.

Question 49

What affects torque?

Answer 49

Magnitude of the force and the distance from the pivot point (lever arm).

Question 50

What is equilibrium in physics?

Answer 50

A state in which all forces acting on an object are balanced.