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Question 20N.1.SL.TZ0.8

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.1.SL.TZ0.8
Level SL Paper 1 Time zone TZ0
Command term Question number 8 Adapted from N/A
8.
[Maximum mark: 1]
20N.1.SL.TZ0.8

A balloon rises at a steady vertical velocity of 10 m s-1. An object is dropped from the balloon at a height of 40 m above the ground. Air resistance is negligible. What is the time taken for the object to hit the ground?

A.  10 s

B.  5 s

C.  4 s

D.  2 s

[1]

Markscheme

C

Examiners report

Even though over half the candidates are choosing the correct response it has a low discrimination index. Many are choosing D indicating that they forgot to take the velocity upward as negative.

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