IB Physics HL A 2 17 Impulse Questions

Practise analysing HL impulse and momentum data, including variable force graphs, collisions and rocket-engine dynamics.

Exam points

Define impulse from the resultant external force as J = FΔt = Δp.
Calculate impulse, momentum change or average force from complete force–time and momentum evidence, preserving vector direction and units.

[Maximum number: 3]

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

Figure for Question IB Physics HL A 2 17 Impulse Questions question 1 — IB Physics HL

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.

same change in momentum/impulse;
the time taken to stop would be greater with the snow

$F=\frac{\Delta p}{\Delta t}$ , therefore F is smaller with the snow

OR

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

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IB Physics HL A 2 17 Impulse Questions question 1