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Question 17N.2.HL.TZ0.a

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Date November 2017 Marks available [Maximum mark: 2] Reference code 17N.2.HL.TZ0.a
Level HL Paper 2 Time zone TZ0
Command term Show that Question number a Adapted from N/A
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17N.2.HL.TZ0.a

There is a proposal to power a space satellite X as it orbits the Earth. In this model, X is connected by an electronically-conducting cable to another smaller satellite Y.

Satellite X orbits 6600 km from the centre of the Earth.

Mass of the Earth = 6.0 x 1024 kg

Show that the orbital speed of satellite X is about 8 km s–1.

[2]

Markscheme

« v = G M E r » = 6.67 × 10 − 11 × 6.0 × 10 24 6600 × 10 3

7800 «m s–1»

Full substitution required

Must see 2+ significant figures.

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