Edexcel A-Level Physics Relationships from Graphs

Review relationships and constants from graphs in Edexcel A-Level Physics through large-triangle gradients, intercepts, linearised plots and claims.

Exam points

calculate gradients with a large triangle and quote constants to suitable significant figures
use graph gradients or intercepts to find constants in linear and logarithmic relationships
choose transformed graph plots such as T² against 1/M to test whether a relationship is linear

[Maximum number: 3]

A student investigated the damped oscillations of a pendulum using the apparatus shown.

The paper cone acted as a damper.
The student displaced the cone and allowed the pendulum to oscillate.
He measured the amplitude A every 5 oscillations and recorded the value to the nearest 5 mm.

Figure for Question 6.5.5 - Relationship or constant from a graph question 1 — Edexcel A-Level Physics A2

The relationship between A and the number of oscillations n is

A=A_0 e^- n

where A_0 is the initial amplitude and is a constant.

Determine the value of from the graph.

Table for Question 6.5.5 - Relationship or constant from a graph question 1 — Edexcel A-Level Physics A2

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6.5.5 - Relationship or constant from a graph question 1