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Question 19M.1.SL.TZ1.9

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1.SL.TZ1.9
Level SL Paper 1 Time zone TZ1
Command term Question number 9 Adapted from N/A
9.
[Maximum mark: 1]
19M.1.SL.TZ1.9

A block is on the surface of a horizontal rotating disk. The block is at rest relative to the disk. The disk is rotating at constant angular velocity.

What is the correct arrow to represent the direction of the frictional force acting on the block at the instant shown?

[1]

Markscheme

C

Examiners report

Candidate responses were largely divided between responses C and D, suggesting some confusion around the direction of frictional force in a rotating object (vs. linear motion).

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