1
Q
Definition of moment
A
- The turning effect of a force about some axis or point
- moment = force x perpendicular distance of the line of action of force from the axis / point of rotation / pivot point
• moment = F x d
-measured in Nm
2
Q
Equilibrium definition
A
• Net force is zero
-horizontal + vertical components balanced
• Net moment is zero
-principle of moments
3
Q
What is the principle of moments
A
Body in rotational equilibrium, sum of anticlockwise moments about a point is equal to sum of clockwise moments about same point
A Level OCR Physics (AS/Year1)
flashcards
Decks in class (66)
# Cards
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Chapter 8.1 - Current & Charge9
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Chapter 8.2 - Moving Charges7
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Chapter 8.3 - Kirchoff's First Law3
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Chapter 8.4 - Mean Drift Velocity6
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Chapter 9.1 - Circuit Symbols15
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Chapter 9.2 Potential Deference & Electromotive Force4
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Chapter 9.3 - The Electron Gun4
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Chapter 9.4 - Resistance5
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Chapter 9.5 I-V Characteristics4
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Chapter 9.6 - Diodes3
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Chapter 9.7 - Resistace & Resitivity7
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Chapte 9.8 - The Thermistor4
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Chapter 9.9 - The LDR3
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Chapter 9.10 - Electrical Energy & Power3
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Chapter 9.11 - Paying For Electricity2
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Chapte 2.1 - Quantities & Units0
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Chapter 2.2 - Derived Units0
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Chapter 2.3 Scalar & Vector Quantities0
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Chapter 2.4 - Adding Vectors0
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Chapter 2.5 - Resolving Vectors0
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Chapter 2.6 - More On Vectors0
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Chapter 3.1 - Distance & Speed0
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Chapter 3.2 - Displacement & Velocity0
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Chapter 3.3 - Acceleration0
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Chapter 3.4 - More On Velocity-Time Graphs0
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Chapter 3.5 Equations Of Motion0
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Chapter 3.6 - Car Stopping Distances0
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Chapter 3.7 - Free Fall & g0
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Chapter 3.8 - Projectile Motion0
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Chapter 11.1 - Progressive Waves0
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Chapter 11.2 - Wave Properties0
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Chapter 11.3 - Reflection & Refraction0
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Chapter 11.4 - Diffraction & Polarisation0
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Chapter 11.5 - Intensity0
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Chapter 11.6 - Electromagnetic Waves0
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Chapter 11.7 - Polarisation Of Electromagnetic Waves0
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Chapter 11.8 - Refractive Index0
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Chapter 11.9 - Total Internal Reflection0
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4.15
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4.23
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4.30
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4.40
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4.53
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4.61
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4.75
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4.80
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4.90
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7.14
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7.20
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7.31
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7.41
-
7.50
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12.17
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12.213
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12.35
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12.49
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12.510
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12.68
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10.13
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10.25
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10.31
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10.47
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10.50
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10.60
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13.110
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13.21
