IB Physics HL A 4 2 Hl Rotational Equilibrium Questions

Apply clockwise and anticlockwise moments to rotational equilibrium, selecting a pivot and distinguishing zero resultant torque from zero resultant force.

Exam points

State rotational equilibrium as zero resultant torque and set clockwise moments equal to anticlockwise moments.
Choose a pivot and use moment arms and force components to calculate support, contact or wall forces.
Distinguish translational equilibrium (zero resultant force) from rotational equilibrium (zero resultant torque) when analysing a rigid body.

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Study A.4.2 (HL)—Rotational equilibrium conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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A uniform cylinder, of mass M and length L, has a moment of inertia of $\frac{1}{12} M L^{2}$ when rotated about an axis through its centre.

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State the condition for rotational equilibrium.

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IB Physics HL A 4 2 Hl Rotational Equilibrium Questions question 1