DP Physics (last assessment 2024)

Question 21N.2.SL.TZ0.c

Date	November 2021	Marks available	[Maximum mark: 1]	Reference code	21N.2.SL.TZ0.c
Level	SL	Paper	2	Time zone	TZ0
Command term	Estimate	Question number	c	Adapted from	N/A

[Maximum mark: 1]

21N.2.SL.TZ0.c

A ball of mass 0.250 kg is released from rest at time t = 0, from a height H above a horizontal floor.

The graph shows the variation with time t of the velocity v of the ball. Air resistance is negligible. Take g = −9.80 m s⁻². The ball reaches the floor after 1.0 s.

Estimate the loss in the mechanical energy of the ball as a result of the collision with the floor.

[1]

Markscheme

« loss of KE is $\frac{1}{2} \times 0.25 \times (9 . 8^{2} - 5^{2}) =$ » $8.9$ «J» ✓

Award [1] mark for an answer in the range 8.7 - 9.5.

Syllabus sections

Core

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

Core » Topic 2: Mechanics

Question 21N.2.SL.TZ0.c

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