DP Physics (first assessment 2025)

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Question EXE.2.HL.TZ0.5

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Date Example questions Example questions Marks available [Maximum mark: 7] Reference code EXE.2.HL.TZ0.5
Level HL Paper 2 Time zone TZ0
Command term Calculate, Deduce, Determine Question number 5 Adapted from N/A
5.
[Maximum mark: 7]
EXE.2.HL.TZ0.5

A curling stone of mass 17 kg travelling at 2.5 cm s−1 collides with a second stationary curling stone of mass 19 kg. The second curling stone is scattered with a speed of 0.50 cm s−1 at an angle of 30° to the initial direction of the first stone.

(a.i)

Calculate the component of momentum of the first curling stone perpendicular to the initial direction.

[1]

Markscheme

v17 sin θ=19×0.5×sin3017=0.279 m s-1  ✓ 

(a.ii)

Calculate the velocity component of the first curling stone in the initial direction.

[2]

Markscheme

v17 cos θ=17×2.5-19×0.50×cos3017  ✓ 

=2.02 m s-1  ✓ 

(a.iii)

Determine the velocity of the first curling stone.

[2]

Markscheme

2.04 m s−1  ✓ 

At 7.9° to initial direction  ✓ 

(b)

Deduce whether this collision is elastic.

[2]

Markscheme

Total angle between stones is 38°, angle will be 90° when elastic

OR

Compares kinetic energies in a correct calculation (initial ke = 53 J, final ke = 34 J +2.4 J) ✓   


Collision is not elastic ✓

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