DP Physics (last assessment 2024)

Question 17N.2.HL.TZ0.2a

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

[Maximum mark: 2]

17N.2.HL.TZ0.2a

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.

(a)

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

« $v = \sqrt {\frac{{G{M_E}}}{r}}$ » = $\sqrt {\frac{{6.67 \times {{10}^{ - 11}} \times 6.0 \times {{10}^{24}}}}{{6600 \times {{10}^3}}}}$

7800 «m s^–1»

Full substitution required

Must see 2+ significant figures.

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Additional higher level (AHL)

Additional higher level (AHL) » Topic 10: Fields » 10.2 – Fields at work

Additional higher level (AHL) » Topic 10: Fields

Question 17N.2.HL.TZ0.2a

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