Students will be able to
Describe how a force is resolved into its perpendicular components. Determine the magnitude and direction of a force from its perpendicular components. Define moment of force or torque as moment = force x perpendicular distance from pivot to the line of action of force. Explain the turning effect of force by relating it to everyday life. State the principle of moments. Define the centre of mass and centre of gravity of a body. Define couple as a pair of forces tending to produce rotation. Prove that the couple has the same moments about all points. Define equilibrium and classify its types by quoting examples from everyday life. State the two conditions ‘ for equilibrium of a body. Solve problems on simple balance systems when bodies are supported by one pivot only. Describe the states of equilibrium and classify them with common examples. Explain effect of position of the centre of mass on the stability of simple objects.
9th Class Physics Chapter 4 Short Question Answers
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9th Class Physics Chapter 4 Solved Numericals
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