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Questions and Answers
What does the principle of moments state regarding an object in equilibrium?
What does the principle of moments state regarding an object in equilibrium?
In an equilibrium state, the total clockwise moment is less than the total anti-clockwise moment.
In an equilibrium state, the total clockwise moment is less than the total anti-clockwise moment.
False
What should be added to the unbalanced end of the ruler in the experiment to achieve balance?
What should be added to the unbalanced end of the ruler in the experiment to achieve balance?
Plasticine
In the principle of moments, the equation for the total anti-clockwise moment equals the total ______ moment.
In the principle of moments, the equation for the total anti-clockwise moment equals the total ______ moment.
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Match the following components with their corresponding values from the experiment:
Match the following components with their corresponding values from the experiment:
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Study Notes
Principle of Moments
- The principle of moments states that the total anti-clockwise moment about a pivot equals the total clockwise moment about the same pivot when an object is in equilibrium (not moving).
Equilibrium
- An object is in equilibrium when the sum of the forces acting on it is zero, and the sum of the moments acting on it is zero.
Experiment 15.2
- A metre rule is clamped to a retort stand at its centre.
- The rule is balanced by adding plasticine to the heavier end.
- Weights are hung from the rule using strings.
- The distances of the weights from the pivot point are measured.
- The experiment is repeated with different weights and distances.
- The results are recorded in a table that shows the anti-clockwise moment and the clockwise moment.
Table of Results
- The table shows the weight and distance of the weights on each side of the pivot.
- The anti-clockwise moment is calculated by multiplying the weight by the distance from the pivot on the left side of the rule.
- The clockwise moment is calculated by multiplying the weight by the distance from the pivot on the right side of the rule.
Example
- The example shows how to calculate the weight of an object using the principle of moments.
- The equation for the principle of moments is used to calculate the weight of an object.
- The weights and distances are substituted into the equation to find the total anti-clockwise and clockwise moments.
- The weight of the object is then calculated by equating the two total moments and solving for the unknown weight.
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Description
This quiz explores Experiment 15.2 related to the principle of moments and equilibrium in physics. It involves balancing a metre rule and calculating moments using weights and distances from a pivot point. Test your understanding of these concepts through practical questions.
