Paper 2 equations Flashcards

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1
Q

What’s the equation that links speed, distance and time ?

A
  • speed [m/s] = distance [m]/ time [s]
  • ; in physics, the equation is s= vt [because the symbol for speed is v and the symbol for distance is s]
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2
Q

What’s the units, for the equation linking: speed, distance and time

A
  • the unit for speed is m/s [metres per second]
  • the unit for distance is m [metres]
  • and the unit for time is [s] seconds
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3
Q

What’s the equation linking acceleration, change in velocity and time ?

A
  • a = Δv/t
  • in other terms, acceleration [m/s^2]= change in velocity [m/s] ➗time [s]
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4
Q

What’s the units, for the equation linking: acceleration, change in velocity and time?

A
  • the unit for acceleration is m/s^2 [metres per seconds, squared]
  • the unit for change in velocity is m/s [metres per second]
  • and, the unit for time is [s] seconds
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5
Q

How the change in velocity, be calculated?

A
  • the change in velocity, can be calculated by:
  • final velocity [m/s^2] - initial velocity [m/s^2]
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6
Q

What equation is used to show an object accelerating, at a constant rate ?

A
  • v^2 - u^2= 2as
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7
Q

What’s the equation, that links: final velocity, initial velocity, acceleration and distance ?

A
  • v^2 - u^2= 2as
  • v^2 is final velocity
  • u^2 is initial velocity
  • a is acceleration
  • and, m is distance
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8
Q

What’s the units, for the equation linking: final velocity, initial velocity, acceleration and distance ?

A
  • the unit for final velocity is m/s [metres per second]
  • the unit for initial velocity is m/s [metres per second]
  • the unit for acceleration, is m/s^2 [metres per seconds, squared]
  • and, the unit for distance is m
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9
Q

What’s the rearranged form, for the equation linking: final velocity, initial velocity, acceleration and distance [if distance is the subject] ?

A
  • s= (v^2 - u^2)
    ______________
    2a
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10
Q

What’s the rearranged form, for the equation linking: final velocity, initial velocity, acceleration and distance [if acceleration is the subject] ?

A
  • a= (v^2 - u^2)
    ______________
    2s
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11
Q

What’s the rearranged form, for the equation linking: final velocity, initial velocity, acceleration and distance [if final velocity is the subject] ?

A
  • v^2= u^2 + 2as
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12
Q

What’s the equation linking momentum, mass and velocity ?

A
  • momentum [kgm/s]= mass [kg] x velocity [m/s]
  • p= m ✖️velocity
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13
Q

What are the units for the equation linking: momentum, mass and velocity

A
  • the unit for momentum is kgm/s [kilogram metre per second]
  • the unit for mass is the kg [kilogram]
  • and, the unit for velocity is m/s [metres per second]
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14
Q

What is the equation linking period and frequency

A
  • period [seconds]= 1/frequency [Hz]
  • T [period]= 1/f [frequency]
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15
Q

What is the equation linking waves speed, frequency and wavelength ?

A
  • wave speed [m/s]= frequency [Hz] ✖️wavelength [m]
  • v [m/s]= f [Hz] ✖️ λ [m]
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16
Q

What are the units for the equations linking: wave speed, frequency and wavelength ?

A
  • the unit for wave speed is m/s [metres per second]
  • the unit for frequency is Hz [hertz]
  • and, the unit for wavelength is m [metres]