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Question 18M.3.HL.TZ1.7b

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.3.HL.TZ1.7b
Level HL Paper 3 Time zone TZ1
Command term Calculate Question number b Adapted from N/A
b.
[Maximum mark: 2]
18M.3.HL.TZ1.7b

An observer A is on the surface of planet X. Observer B is in a stationary spaceship above the surface of planet X.

Observer A sends a beam of light with a frequency 500 THz towards observer B. When observer B receives the light he observes that the frequency has changed by Δf.

M18/4/PHYSI/HP3/ENG/TZ1/07_01

Observer B then sends a signal with frequency 1500 THz towards observer A.

M18/4/PHYSI/HP3/ENG/TZ1/07_02

(b)

Calculate the gravitational field strength on the surface of planet X.

                                    The following data is given:

                                    Δf = 170 Hz.

The distance between observer A and B is 10 km. 

[2]

Markscheme

g = «c2  Δ f f Δ h =» (3 × 108)2 170 5.0 × 10 14 × 10 000

g = 3.1 «ms–2»

 

If POT mistake, award [0].

Award [2] for BCA.

[2 marks]

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