Paper 2 equations

Question 1

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

Answer 1

• 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]

Question 2

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

Answer 2

• 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

Question 3

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

Answer 3

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

Question 4

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

Answer 4

• 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

Question 5

How the change in velocity, be calculated?

Answer 5

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

Question 6

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

Answer 6

• v^2 - u^2= 2as

Question 7

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

Answer 7

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

Question 8

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

Answer 8

• 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

Question 9

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

Answer 9

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

Question 10

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

Answer 10

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

Question 11

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

Answer 11

• v^2= u^2 + 2as

Question 12

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

Answer 12

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

Question 13

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

Answer 13

• 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]

Question 14

What is the equation linking period and frequency

Answer 14

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

Question 15

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

Answer 15

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

Question 16

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

Answer 16

• 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]