Curriculum
Course: Igcse Physics
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Curriculum

Igcse Physics

1. Motion, Forces and Energy

0/161 Dr Dabour Hub Science Diagram and Course Material

2. Thermal Physics

0/75 Dr Dabour Hub Science Diagram and Course Material

3. Waves

0/77 Dr Dabour Hub Science Diagram and Course Material

4. Electricity and Magnetism

0/119 Dr Dabour Hub Science Diagram and Course Material

5. Nuclear Physics

0/39 Dr Dabour Hub Science Diagram and Course Material

6. Space Physics

0/47 Dr Dabour Hub Science Diagram and Course Material
Quiz

6.1.6 Orbital Speed Equation – Check yourself

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1.
What force keeps a planet in orbit around the Sun?
Friction
The Sun's gravity
Magnetic force
The planet's own weight only
2.
Which is the correct equation for orbital speed?
v = r / T
v = πr / T
v = 2πr / T
v = 2πT / r
3.
A moon orbits in a circle of radius 4.0 × 10⁸ m with a period of 2.4 × 10⁶ s. What is its speed?
1.0 × 10³ m/s
1.7 × 10² m/s
1.0 × 10⁶ m/s
6.0 × 10¹ m/s
4.
Compared with the Earth, Neptune moves…
Faster
More slowly
At the same speed
Not at all
5.
The period of a geostationary satellite is…
90 minutes
12 hours
365 days
24 hours
6.
A satellite in circular orbit has constant speed but changing velocity because…
Its direction changes
Its mass changes
The force is zero
The radius changes
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