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Question 19N.1.HL.TZ0.29

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.1.HL.TZ0.29
Level HL Paper 1 Time zone TZ0
Command term Question number 29 Adapted from N/A
29.
[Maximum mark: 1]
19N.1.HL.TZ0.29

Sea waves move towards a beach at a constant speed of 2.0 m s–1. They arrive at the beach with a frequency of 0.10 Hz. A girl on a surfboard is moving in the sea at right angles to the wave fronts. She observes that the surfboard crosses the wave fronts with a frequency of 0.40 Hz.

What is the speed of the surfboard and what is the direction of motion of the surfboard relative to the beach?

 

[1]

Markscheme

B

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