DP Physics (first assessment 2025)

Question 19M.2.SL.TZ2.1ai

Date	May 2019	Marks available	[Maximum mark: 2]	Reference code	19M.2.SL.TZ2.1ai
Level	SL	Paper	2	Time zone	TZ2
Command term	Calculate	Question number	ai	Adapted from	N/A

ai.

[Maximum mark: 2]

19M.2.SL.TZ2.1ai

(ai)

Calculate the average force exerted by the racquet on the ball.

[2]

Markscheme

$F = \frac{{\Delta mv}}{{\Delta t}}/m\frac{{\Delta v}}{{\Delta t}}/\frac{{0.058 \times 64.0}}{{25 \times {{10}^{ - 3}}}}$ ✔

$F$ = 148« ${\text{N}}$ »≈150« ${\text{N}}$ » ✔

Examiners report

At both HL and SL many candidates scored both marks for correctly answering this. A straightforward start to the paper. For those not gaining both marks it was possible to gain some credit for calculating either the change in momentum or the acceleration. At SL some used 64 ms-1 as a value for a and continued to use this value over the next few parts to the question.

Syllabus sections

A. Space, time and motion » A.2 Forces and momentum

Question 19M.2.SL.TZ2.1ai

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