DP Physics (last assessment 2024)

Question 20N.3.SL.TZ0.c

Date	November 2020	Marks available	[Maximum mark: 1]	Reference code	20N.3.SL.TZ0.c
Level	SL	Paper	3	Time zone	TZ0
Command term	Calculate	Question number	c	Adapted from	N/A

[Maximum mark: 1]

20N.3.SL.TZ0.c

A bar rotates horizontally about its centre, reaching a maximum angular velocity in six complete rotations from rest. The bar has a constant angular acceleration of $0.110 rad s^{- 2}$ . The moment of inertia of the bar about the axis of rotation is $0.0216 kg m^{2}$ .

Calculate the torque acting on the bar while it is accelerating.

[1]

Markscheme

$Γ = « I α so Γ = 0.110 \times 0.0216 = » 2.38 \times 10^{- 3} « N m »$ ✓

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Option B: Engineering physics

Option B: Engineering physics » Option B: Engineering physics (Core topics) » B.1 – Rigid bodies and rotational dynamics

Option B: Engineering physics » Option B: Engineering physics (Core topics)

Question 20N.3.SL.TZ0.c

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