Cambridge IGCSE Physics practice

Paper 4 structured question: The Earth

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At a glance

Paper

Marks

Topic

The Earth

Exam-style question

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Paper 4Theory (Extended)5 marks

Understanding orbital mechanics

Description

A satellite orbits Earth with a radius of 7000 km and takes 90 minutes to complete one orbit. Calculate its average orbital speed.

a
Define average orbital speed.
Your answer
Aim for approximately 2 distinct marking points.
[2]
b
State the average orbital speed of the satellite in m/s.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 4Theory (Extended)1 marks

Description

An object is in a circular orbit with an average radius of 15 m and completes one orbit in 10 seconds.

a
State the formula for average orbital speed.
Your answer
Aim for approximately 1 distinct marking point.
[1]