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Question 17N.2.SL.TZ0.1c

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Date November 2017 Marks available [Maximum mark: 2] Reference code 17N.2.SL.TZ0.1c
Level SL Paper 2 Time zone TZ0
Command term Calculate Question number c Adapted from N/A
c.
[Maximum mark: 2]
17N.2.SL.TZ0.1c

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

(c)

When the sledge is moving on the horizontal region of the snow, the girl jumps off the sledge. The girl has no horizontal velocity after the jump. The velocity of the sledge immediately after the girl jumps off is 4.2 m s–1. The mass of the girl is 55 kg and the mass of the sledge is 5.5 kg. Calculate the speed of the sledge immediately before the girl jumps from it.

[2]

Markscheme

mention of conservation of momentum

OR

5.5 x 4.2 = (55 + 5.5) «v»

0.38 «m s–1»

Allow p=p′ or other algebraically equivalent statement

Award [0] for answers based on energy

 

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