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Question 17N.2.SL.TZ0.d

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Date November 2017 Marks available [Maximum mark: 3] Reference code 17N.2.SL.TZ0.d
Level SL Paper 2 Time zone TZ0
Command term Outline Question number d Adapted from N/A
d.
[Maximum mark: 3]
17N.2.SL.TZ0.d

A girl on a sledge is moving down a snow slope at a uniform speed.

The girl chooses to jump so that she lands on loosely-packed snow rather than frozen ice. Outline why she chooses to land on the snow.

[3]

Markscheme

same change in momentum/impulse

the time taken «to stop» would be greater «with the snow»

F = Δ p Δ t therefore F is smaller «with the snow»

OR

force is proportional to rate of change of momentum therefore F is smaller «with the snow»

Allow reverse argument for ice

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