Which graph best shows how the kinetic energy of a simple pendulum varies with displacement from the equilibrium position?
A
B
C
D - AQA - A-Level Physics - Question 31 - 2017 - Paper 1
Question 31
Which graph best shows how the kinetic energy of a simple pendulum varies with displacement from the equilibrium position?
A
B
C
D
Worked Solution & Example Answer:Which graph best shows how the kinetic energy of a simple pendulum varies with displacement from the equilibrium position?
A
B
C
D - AQA - A-Level Physics - Question 31 - 2017 - Paper 1
Step 1
Identify the relationship between kinetic energy and displacement
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Answer
In a simple pendulum, the kinetic energy (KE) varies inversely with displacement from the equilibrium position. At the maximum displacement, the kinetic energy is minimum (almost zero), while the kinetic energy is maximum when the pendulum is at the equilibrium position.
Step 2
Evaluate the graphs
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Answer
Graph D illustrates this relationship accurately. It shows that kinetic energy is at its peak when the displacement is zero and decreases as the displacement increases in either direction.
Step 3
Select the correct answer
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