DP Physics (last assessment 2024)

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Question 21N.2.SL.TZ0.1a

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

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.

(a)

Determine H.

[1]

Markscheme

H = «12gt2 =» 4.9 «m» ✓


Accept other methods as area from graph, alternative kinematics equations or conservation of mechanical energy.
Award [1] for a bald correct answer in the range 4.9 - 5.1.
Award [0] if time used is different than 1.0 s.

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