10 - Motion

• What is the formula for speed?

  Speed = distance ÷ time
• How can distance be calculated?

  Distance = speed × time
• What is the formula for time?

  Time = distance ÷ speed
• What is the formula for wave speed?

  Wavespeed = frequency × wavelength
• What are the units for wave speed, frequency, and wavelength?

  m/s, Hz, m
• What is the relationship between ramp height and trolley speed?

  • As ramp height increases, trolley speed increases.
  • Height increase of 97mm results in speed increase of 0.64m/s.
• How do reaction times affect the experiment's accuracy?

  They affect the timing of the trolley's descent
• Why must the position of the person timing be controlled?

  To keep the end point constant
• What happens to trolley acceleration as ramp height increases?

  • Trolley acceleration increases with ramp height.
  • Doubling ramp height increases acceleration by a factor of 5/6.
• How can acceleration be measured using lightgates?

  Use two lightgates for velocity change and time
• What is the formula for acceleration?

  Acceleration = change in velocity ÷ time taken
• What are the units for acceleration?

  m/s²
• What does the formula $a =$$(v - u) / t$ represent?


  Acceleration as change in velocity over time
• What do 'u' and 'v' represent in the acceleration formula?

  'u' is start speed, 'v' is end speed