DP Physics (first assessment 2025)

Question EXE.2.HL.TZ0.3b

Date	Example questions Example questions	Marks available	[Maximum mark: 3]	Reference code	EXE.2.HL.TZ0.3b
Level	HL	Paper	2	Time zone	TZ0
Command term	Determine	Question number	b	Adapted from	N/A

[Maximum mark: 3]

EXE.2.HL.TZ0.3b

(b)

Determine the angle θ that the velocity of ball B makes with the initial direction of motion of ball A.

[3]

Markscheme

The use of conservation of momentum in the horizontal direction, e.g. $m \times 1.0 \times \cos 45 ° + m \times v_{x} = m \times 2.0$ ✓

$v_{x} =$ « $2.0 - 1.0 \times \cos 45 ° =$ » $1.3$ «m s⁻¹» ✓

$θ = \tan^{- 1} (\frac{v_{y}}{v_{x}}) = 29 °$ ✓

Syllabus sections