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Movement and position

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Question 2

A physics student designs an experiment to study the motion of a low-friction glider sliding down a constant-gradient inclined air track.

The student plans the experiment as follows:

  • Release the glider from rest at 5 different starting distances from a light gate positioned near the bottom of the track: 30 cm30\text{ cm}30 cm, 60 cm60\text{ cm}60 cm, 90 cm90\text{ cm}90 cm, 120 cm120\text{ cm}120 cm, and 150 cm150\text{ cm}150 cm.
  • Measure the final speed of the glider as it passes through the light gate.
  • Repeat the final speed measurement 3 times for each starting distance and calculate the mean average.
  • Keep the initial speed of the glider at exactly zero for each release.
a.

Identify the independent variable and the dependent variable in this investigation.

[2]
b.

At a starting distance of 120 cm120\text{ cm}120 cm, the student records the following raw data for the final speed:

  • Trial 1: 1.94 m/s1.94\text{ m/s}1.94 m/s
  • Trial 2: 1.87 m/s1.87\text{ m/s}1.87 m/s
  • Trial 3: 1.91 m/s1.91\text{ m/s}1.91 m/s

Calculate the average (mean) final speed for this starting distance. Give your answer to 222 decimal places.

[2]

Movement and position Questions

  1. IGCSE
  2. /Physics
  3. /Movement and position