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Conceptual Questions on Rotatory and Circular Motion

This page consists of solved conceptual questions on Rotatory and Circular Motion included in the course of Physics for Grade 11.
Q 1 Why is the fly wheel of an engine made heavy in the rim?
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Q 2 Why is a rifle barrel ‘rifled’?
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Q 3 Is it possible for a person to distinguish between a raw egg and a hard boiled one by spinning each on a table? Explain.
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Q 4 Why is the acceleration of a body moving in a circle, directed towards the center?
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Q 5 A ball is just supported by a string without breaking. If it is set in swinging, it breaks. Why?
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Q 6 An insect is sitting close to the axis of a wheel. If the friction between the insect and the wheel is very small, describe the motion of the insect when the wheel starts rotating.
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Q 7 Explain how many minimum number of geo-stationary satellites are required for global coverage of T.V transmission?
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Q 8 Explain the significance of moment of inertia in rotatory motion.
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Q 9 Why does the coasting rotating system slow down as water drops into the beaker?
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Q 10 A body will be weightless when the elevator falls down just like a free falling body. Explain.
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Q 11 When a tractor moves with uniform velocity, its heavier wheel rotates slowly than its lighter wheel, why? Explain.
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