DP Physics (last assessment 2024)

Question 19N.2.SL.TZ0.c

Date	November 2019	Marks available	[Maximum mark: 3]	Reference code	19N.2.SL.TZ0.c
Level	SL	Paper	2	Time zone	TZ0
Command term	Determine	Question number	c	Adapted from	N/A

[Maximum mark: 3]

19N.2.SL.TZ0.c

The graph shows the variation with time t of the horizontal force F exerted on a tennis ball by a racket.

The tennis ball was stationary at the instant when it was hit. The mass of the tennis ball is 5.8 × 10^–2 kg. The area under the curve is 0.84 N s.

Determine, with reference to the work done by the average force, the horizontal distance travelled by the ball while it was in contact with the racket.

[3]

Markscheme

E_k= $\frac{1}{2}$ × 5.8 × 10^–2× 14.5²✔

E_k = W ✔

s = « $\frac{W}{F} = \frac{\frac{1}{2} \times 5.8 \times 10^{- 2} \times 14 . 5^{2}}{53} =$ » 0.12 « m » ✔

Allow ECF from (a) and (b)

Allow ECF from MP1

Award [2] max for a calculation without reference to work done, eg: average velocity × time

Syllabus sections

Core

Core » Topic 2: Mechanics » 2.3 – Work, energy, and power

Core » Topic 2: Mechanics

Question 19N.2.SL.TZ0.c

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