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Question 18M.2.HL.TZ2.b

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.2.HL.TZ2.b
Level HL Paper 2 Time zone TZ2
Command term Calculate Question number b Adapted from N/A
b.
[Maximum mark: 1]
18M.2.HL.TZ2.b

A planet has a radius of 3.1 × 106 m. At a point P a distance 2.4 × 107 m above the surface of the planet the gravitational field strength is 2.2 N kg–1. Calculate the gravitational potential at point P, include an appropriate unit for your answer.

[1]

Markscheme

V = «–2.2 × (3.1 × 106 + 2.4 × 107) =» «–» 6.0 × 107 J kg–1

 

Unit is essential

Allow eg MJ kg–1 if power of 10 is correct

Allow other correct SI units eg m2s–2, N m kg–1

[1 mark]

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