DP Physics (last assessment 2024)

Question 21M.2.SL.TZ2.b.ii

Date	May 2021	Marks available	[Maximum mark: 3]	Reference code	21M.2.SL.TZ2.b.ii
Level	SL	Paper	2	Time zone	TZ2
Command term	Deduce	Question number	b.ii	Adapted from	N/A

b.ii.

[Maximum mark: 3]

21M.2.SL.TZ2.b.ii

A football player kicks a stationary ball of mass 0.45 kg towards a wall. The initial speed of the ball after the kick is 19 m s⁻¹ and the ball does not rotate. Air resistance is negligible and there is no wind.

The top of the wall is 2.4 m above the ground. Deduce whether the ball will hit the wall.

[3]

Markscheme

$initial vertical speed = 19 \times \sin 22 « = 7.1 {m s}^{- 1} »$ ✓

$« 7.12 \times 0.624 - 0.5 \times 9.81 \times 0 . 624^{2} = » 2.5 « m »$ ✓

ball does not hit wall OR 2.5 «m» > 2.4 «m» ✓

Allow ECF from (b)(i) and from MP1

Allow g = 10 m s⁻²

Syllabus sections

Core

Core » Topic 2: Mechanics » 2.1 – Motion

Core » Topic 2: Mechanics

Question 21M.2.SL.TZ2.b.ii

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