DP Physics (last assessment 2024)

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Question 21M.2.SL.TZ1.1d.ii

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Date May 2021 Marks available [Maximum mark: 3] Reference code 21M.2.SL.TZ1.1d.ii
Level SL Paper 2 Time zone TZ1
Command term Calculate, State Question number d.ii Adapted from N/A
d.ii.
[Maximum mark: 3]
21M.2.SL.TZ1.1d.ii

Two players are playing table tennis. Player A hits the ball at a height of 0.24 m above the edge of the table, measured from the top of the table to the bottom of the ball. The initial speed of the ball is 12.0 m s−1 horizontally. Assume that air resistance is negligible.

The ball bounces and then reaches a peak height of 0.18 m above the table with a horizontal speed of 10.5 m s−1. The mass of the ball is 2.7 g.

(d.ii)

Player B intercepts the ball when it is at its peak height. Player B holds a paddle (racket) stationary and vertical. The ball is in contact with the paddle for 0.010 s. Assume the collision is elastic.

Calculate the average force exerted by the ball on the paddle. State your answer to an appropriate number of significant figures.

[3]

Markscheme

Δv = 21 «m s−1» ✓

F=0.0027 ×210.01

OR

5.67 «N» ✓

any answer to 2 significant figures «N» ✓

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