DP Physics (last assessment 2024)

Question 19N.3.SL.TZ0.a

Date	November 2019	Marks available	[Maximum mark: 1]	Reference code	19N.3.SL.TZ0.a
Level	SL	Paper	3	Time zone	TZ0
Command term	State	Question number	a	Adapted from	N/A

[Maximum mark: 1]

19N.3.SL.TZ0.a

A flywheel is made of a solid disk with a mass M of 5.00 kg mounted on a small radial axle. The mass of the axle is negligible. The radius R of the disk is 6.00 cm and the radius r of the axle is 1.20 cm.

A string of negligible thickness is wound around the axle. The string is pulled by an electric motor that exerts a vertical tension force T on the flywheel. The diagram shows the forces acting on the flywheel. W is the weight and N is the normal reaction force from the support of the flywheel.

The moment of inertia of the flywheel about the axis is $I = \frac{1}{2} M R^{2}$ .

State the torque provided by the force W about the axis of the flywheel.

[1]

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zero ✔

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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 19N.3.SL.TZ0.a

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