Paper 2 equations Flashcards
What’s the equation that links speed, distance and time ?
- 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]
What’s the units, for the equation linking: speed, distance and time
- 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
What’s the equation linking acceleration, change in velocity and time ?
- a = Δv/t
- in other terms, acceleration [m/s^2]= change in velocity [m/s] ➗time [s]
What’s the units, for the equation linking: acceleration, change in velocity and time?
- 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
How the change in velocity, be calculated?
- the change in velocity, can be calculated by:
- final velocity [m/s^2] - initial velocity [m/s^2]
What equation is used to show an object accelerating, at a constant rate ?
- v^2 - u^2= 2as
What’s the equation, that links: final velocity, initial velocity, acceleration and distance ?
- v^2 - u^2= 2as
- v^2 is final velocity
- u^2 is initial velocity
- a is acceleration
- and, m is distance
What’s the units, for the equation linking: final velocity, initial velocity, acceleration and distance ?
- 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
What’s the rearranged form, for the equation linking: final velocity, initial velocity, acceleration and distance [if distance is the subject] ?
- s= (v^2 - u^2)
______________
2a
What’s the rearranged form, for the equation linking: final velocity, initial velocity, acceleration and distance [if acceleration is the subject] ?
- a= (v^2 - u^2)
______________
2s
What’s the rearranged form, for the equation linking: final velocity, initial velocity, acceleration and distance [if final velocity is the subject] ?
- v^2= u^2 + 2as
What’s the equation linking momentum, mass and velocity ?
- momentum [kgm/s]= mass [kg] x velocity [m/s]
- p= m ✖️velocity
What are the units for the equation linking: momentum, mass and velocity
- 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]
What is the equation linking period and frequency
- period [seconds]= 1/frequency [Hz]
- T [period]= 1/f [frequency]
What is the equation linking waves speed, frequency and wavelength ?
- wave speed [m/s]= frequency [Hz] ✖️wavelength [m]
- v [m/s]= f [Hz] ✖️ λ [m]