DP Physics (last assessment 2024)

Question 21M.2.SL.TZ2.1a

Date	May 2021	Marks available	[Maximum mark: 2]	Reference code	21M.2.SL.TZ2.1a
Level	SL	Paper	2	Time zone	TZ2
Command term	Calculate	Question number	a	Adapted from	N/A

[Maximum mark: 2]

21M.2.SL.TZ2.1a

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.

(a)

The player’s foot is in contact with the ball for 55 ms. Calculate the average force that acts on the ball due to the football player.

[2]

Markscheme

$Δ p = 0.45 \times 19 OR a = \frac{19}{0.055}$ ✓

$« = F = \frac{0.45 \times 19}{0.055} » 160 « N »$ ✓

Allow [2] marks for a bald correct answer.

Allow ECF for MP2 if 19 sin22 OR 19 cos22 used.

Syllabus sections

Core

Core » Topic 2: Mechanics » 2.4 – Momentum and impulse

Core » Topic 2: Mechanics

Question 21M.2.SL.TZ2.1a

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