# Circular Motion – Question 2

Man-made satellites can orbit the Earth

The satellite experiences a resultant force directed towards the centre of the orbit.

The resultant force is called the centripetal force.

2 (a) What provides the centripetal force on the satellite?

(1 mark)

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2 (b) State two factors that determine the size of the centripetal force on the satellite.

(2 marks)

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2 (c) Here are data for five different satellites orbiting the Earth:

2 (c) (i) State the relationship, if any, between the height of the satellite above the Earth’s surface and the time taken for the satellite to orbit the Earth once.

(1 mark)

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2 (c) (ii) State the relationship, if any, between the time taken for the satellite to orbit the Earth once and the satellite’s mass.

(1 mark)

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2 (d) Over 300 years ago, the famous scientist Isaac Newton proposed, with a ‘thought experiment’, the idea of satellites.

Newton suggested that if an object was fired at the right speed from the top of a high mountain, it would circle the Earth.

Why did many people accept Isaac Newton’s idea as being possible?
Tick one statement:

Isaac Newton was a respected scientist who had made new discoveries before.

Isaac Newton went to university.

It was a new idea that nobody else had thought of before.

(1 mark)

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From Q2 P3 AQA June 2014 (Higher)

Circular Motion – Question 2 was last modified: November 27th, 2015 by