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In Ohm’s experiments, the values of the unknown resistances were found to be 6.12 Ω, 6.09 Ω, 6.22 Ω, 6.15 Ω. Calculate the (mean) absolute error, relative error, and percentage error in these measurements.
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Solve the numerical example.
If the length of a cylinder is l = (4.00 ± 0.001) cm, radius r = (0.0250 ± 0.001) cm and mass m = (6.25 ± 0.01) g. Calculate the percentage error in the determination of density.
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Solve the numerical example.
If the formula for a physical quantity is X = `("a"^4"b"^3)/("c"^(1//3)"d"^(1//2))` and if the percentage error in the measurements of a, b, c and d are 2%, 3%, 3% and 4% respectively. Calculate percentage error in X.
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Derive equations of motion for a particle moving in a plane and show that the motion can be resolved in two independent motions in mutually perpendicular directions.
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Answer the following question.
Derive the formula for the range and maximum height achieved by a projectile thrown from the origin with initial velocity `vec"u"` at an angle θ to the horizontal.
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Show that the path of a projectile is a parabola.
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Solve the following problem.
A man throws a ball to maximum horizontal distance of 80 m. Calculate the maximum height reached.
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Solve the following problem.
A particle is projected with speed v0 at angle θ to the horizontal on an inclined surface making an angle Φ (Φ < θ) to the horizontal. Find the range of the projectile along the inclined surface.
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Solve the following problem.
A train is moving eastward at 10 m/sec. A waiter is walking eastward at 1.2m/sec; and a fly is charging toward the north across the waiter’s tray at 2 m/s. What is the velocity of the fly relative to Earth?
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Answer in one sentence.
Why bridges are unsafe after very long use?
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Answer in one sentence.
What is an elastomer?
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Answer in one sentence.
What do you mean by elastic hysteresis?
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Answer in short.
What do you mean by brittle substance? Give any two examples.
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Long answer type question.
Define stress and strain. What are their different types?
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Long answer type question.
Draw a labelled graph of tensile stress against tensile strain for a metal wire up to the breaking point. In this graph show the region in which Hooke’s law is obeyed.
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Answer in one sentence:
What is an elastomer?
Concept: undefined >> undefined
Answer in one sentence:
What is an elastomer?
Concept: undefined >> undefined
Answer in one sentence:
What is an elastomer?
Concept: undefined >> undefined
Answer in one sentence:
What is an elastomer?
Concept: undefined >> undefined
What is an elastomer?
Concept: undefined >> undefined
