Physics Exam Prep
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Physics Exam Prep
This exam covers essential concepts in mechanics, including motion, forces, energy, and friction. Key topics include the equations of motion, conservation of momentum, work-energy theorem, and properties of friction. Und...
Sample questions with model answers
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Find the value of 60 joule/ minute in a system, which has 100gm, 100cm and 1 min as a fundamental units.
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Convert to fundamental units and calculate using dimensional analysis.
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Find the dimensions of momentum, in terms of frequency, velocity and density as the fundamental units.
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Momentum dimensions are [M][L][T⁻¹].
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(i) Derive equation of motion: S = ut + ½ at² by calculus method. (ii) What is the retardation of a moving particle if the relation between time and position is: t = py² +Qy, (where p and Q are constants)
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Use calculus to derive and differentiate to find retardation.
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(i) State and prove impulse momentum theorem. (ii) Fig. shows the position time graph of a particle of mass 4kg. What is the impulse at t = 0 and t = 4 sec. Assume motion is one dimensional.
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Impulse equals change in momentum; calculate from graph.
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