IB Physics HL A 2 16 Linear Momentum Conservation Questions

Practise IB Physics HL A.2.16 by analysing momentum conservation in collisions, recoil and multi-body systems.

Exam points

Define and apply linear momentum p = mv with consistent vector direction and units.
Apply conservation of total linear momentum when no resultant external force acts, using complete collision or interaction evidence.

[Maximum number: 2]

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

Figure for Question IB Physics HL A 2 16 Linear Momentum Conservation Questions question 1 — IB Physics HL

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 $4.2 \mathrm{~m} \mathrm{~s}^{-1}$ . 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.

mention of conservation of momentum

OR

$5.5\times4.2=(55+5.5)v$ $v=0.38\ \mathrm{m\,s^{-1}}$

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IB Physics HL A 2 16 Linear Momentum Conservation Questions question 1