Physics Model Papers Preparation
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answer it correctly according to first PUC PCMC student for exam solved
Sample questions with model answers
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The period of oscillation (T) of a simple pendulum of length (L) has been given as $T = 2\pi \sqrt{\frac{L}{g}}$. Check the dimensional correctness of the equation.
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Dimensional analysis shows both sides have dimensions of time.
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Obtain the expressions for magnitude and direction of a vector in terms of its x and y components.
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Magnitude $R = \sqrt{x^2 + y^2}$; direction $\theta = \tan^{-1}(\frac{y}{x})$.
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What is meant by uniform circular motion? Give the expression for centripetal acceleration and explain the terms.
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Uniform circular motion is motion in a circle at constant speed; centripetal acceleration $a_c = \frac{v^2}{r}$.
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Explain the law of conservation of linear momentum with an illustration.
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Total momentum before collision equals total momentum after; e.g., two colliding billiard balls.
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