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Physics Equations > Equations > Flashcards

Equations Flashcards

1
Q

What is the formula for kinetic energy?

A

kinetic energy = 0.5 x mass × (speed)²

Kinetic energy represents the energy an object possesses due to its motion.

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2
Q

What is the formula for elastic potential energy?

A

elastic potential energy = 0.5 x spring constant × (extension)²

Elastic potential energy is stored in objects that can be stretched or compressed.

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3
Q

What is the formula for gravitational potential energy?

A

gravitational potential energy = mass x gravitational field strength × height

This formula calculates the potential energy stored due to an object’s position in a gravitational field.

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4
Q

What is the formula for change in thermal energy?

A

change in thermal energy = mass × specific heat capacity × temperature change

This equation is used to calculate the energy required to change the temperature of a substance.

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5
Q

How is power defined in terms of energy transferred?

A

power = energy transferred / time

Power measures the rate at which energy is transferred or converted.

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6
Q

What is the formula for efficiency?

A

efficiency = useful output energy transfer / total input energy transfer

Efficiency indicates how effectively energy is converted from one form to another.

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7
Q

What is the relationship between charge flow, current, and time?

A

charge flow = current × time

This formula relates electric charge to current and the time duration over which it flows.

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8
Q

What is the formula for potential difference?

A

potential difference = current x resistance

Potential difference, also known as voltage, is the difference in electric potential energy per unit charge.

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9
Q

What is the formula for power in terms of potential difference and current?

A

power = potential difference × current

This formula calculates the electrical power consumed in a circuit.

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10
Q

What is the formula for power in terms of current and resistance?

A

power = (current)² x resistance

This relationship shows how power dissipates in a resistive component.

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11
Q

What is the formula for energy transferred in terms of power and time?

A

energy transferred = power x time

This equation is used to find out how much energy is consumed over a specific time period.

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12
Q

What is the formula for energy transferred in terms of charge flow and potential difference?

A

energy transferred = charge flow * potential difference

This formula helps calculate the energy transferred by electric charge.

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13
Q

What is the formula for density?

A

density = mass / volume

Density is a measure of how much mass is contained in a given volume.

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14
Q

What is the formula for gravitational potential energy in terms of mass, gravitational field strength, and height?

A

Ep = m g h

This is a specific representation of the gravitational potential energy formula.

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15
Q

What does ΔE represent in the equation ΔE = m c Δθ?

A

ΔE = change in thermal energy

This equation relates to thermal energy changes in a substance.

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16
Q

What does Q = It represent?

A

Q = charge flow, I = current, t = time

This is another representation of the relationship between charge, current, and time.

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17
Q

What is the formula for voltage in terms of current and resistance?

A

V = IR

This is Ohm’s law, which states that voltage is the product of current and resistance.

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18
Q

What is the formula for power in terms of voltage and current?

A

P = VI

This formula is used to calculate the power in an electrical circuit.

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19
Q

What is the formula for power in terms of force and distance?

A

P = F R

This formula shows the relationship between power, force, and distance.

20
Q

What is the formula for energy in terms of power and time?

A

E = Pt

This equation indicates how energy is related to power over time.

21
Q

What is the formula for energy in terms of voltage and current?

A

E = Vt

This formula calculates the energy based on voltage and time.

22
Q

What is the formula for thermal energy during a change of state?

A

mass x specific latent heat

23
Q

For gases, what is the relationship between pressure and volume?

A

pressure x volume = constant

24
Q

What is the formula for weight?

A

mass x gravitational field strength

25
Q

How is work done calculated?

A

force x distance (along the line of action of the force)

26
Q

What is the formula relating force, spring constant, and extension?

A

force = spring constant x extension

27
Q

How is the moment of a force calculated?

A

force x distance (normal to direction of force)

28
Q

What is the formula for pressure?

A

force normal to a surface / area of that surface

29
Q

What is the formula for pressure due to a column of liquid?

A

height of column x density of liquid x gravitational field strength

30
Q

How is distance travelled calculated?

A

speed x time

31
Q

What is the formula for acceleration?

A

(final velocity - initial velocity) / time taken

32
Q

What is the relationship between resultant force, mass, and acceleration?

A

resultant force = mass x acceleration

33
Q

What is the formula for momentum?

A

mass x velocity

34
Q

How is change in momentum related to force and time?

A

force = change in momentum / time taken

35
Q

What is the relationship between period and frequency?

A

period = 1 / frequency

36
Q

How is wave speed calculated?

A

frequency x wavelength

37
Q

What is the formula for magnification?

A

magnification = image height / object height

38
Q

What is the formula for the force on a conductor in a magnetic field?

A

magnetic flux density x current x length

39
Q

How is potential difference across coils related in a transformer?

A

potential difference across primary coil / number of turns in primary coil = potential difference across secondary coil / number of turns in secondary coil

40
Q

What is the power relationship in a transformer?

A

potential difference across primary coil x current in primary coil = potential difference across secondary coil x current in secondary coil

41
Q

What is the formula for gravitational potential energy?

A

W = m g

42
Q

What is the relationship between pressure and height in a fluid?

A

p = hpg

43
Q

How is force related to acceleration?

A

F = m a

44
Q

What is the formula for pressure in terms of momentum?

A

p = mv

45
Q

What is the formula for the force in terms of current and magnetic field?

A

F = BIl

46
Q

Fill in the blank: The formula for the volume in terms of pressure is _____

A

pV = constant

47
Q

Fill in the blank: The formula for the spring force is _____

A

F = ke

Physics Equations (1 decks)

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