Equilibrium of a Rigid body

Worked examples (6)

• 1Moment of a force at right angles
• 2Signing two moments by sense
• 3Moment of a slanted force by resolving
• 4Perpendicular distance using trigonometry
• 5Resultant moment of three forces
• 6Resultant moment with a slanted force

Model answers (6)

• ✓Model answer 1
• ✓Model answer 2
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• ✓Model answer 6

Worked examples (6)

• 1Beam on two supports
• 2Slide first or topple first?
• 3Ladder against a smooth wall on rough ground
• 4Hinged rod held by a horizontal string
• 5Ladder with a person — minimum friction
• 6Ladder against a ROUGH wall

Model answers (6)

• ✓Model answer 1
• ✓Model answer 2
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• ✓Model answer 5
• ✓Model answer 6

Worked examples (5)

• 1Weight of a uniform rod acting at the midpoint
• 2Moment of a rod's weight about its end
• 3Tilt angle of a suspended rectangular lamina
• 4Locating the centre of mass by the plumb-line method
• 5Tilt of a rod carrying a particle at one end

Model answers (6)

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• ✓Model answer 2
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• ✓Model answer 5
• ✓Model answer 6

Worked examples (6)

• 1Centre of mass of three particles
• 2Quoting a standard result from MF19
• 3Composite lamina by addition (rectangle + triangle)
• 4Composite lamina by subtraction (hole = negative mass)
• 5Composite solid by addition (cylinder + hemisphere)
• 6Semicircular lamina with a semicircular hole

Model answers (6)

• ✓Model answer 1
• ✓Model answer 2
• ✓Model answer 3
• ✓Model answer 4
• ✓Model answer 5
• ✓Model answer 6