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# grade11

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A body is moving in a circular path with constant speed. Is this motion a simple harmonic?
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A body is moving in a circular path with constant speed. Is this motion a simple harmonic?

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Why is the bottom of a ship made heavy?
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Why is the bottom of a ship made heavy?

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A pendulum clock is taken to moon. Will it gain or lose time?
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A pendulum clock is taken to moon. Will it gain or lose time?

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A cork is floating in water. What is the apparent weight of the cork?
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A cork is floating in water. What is the apparent weight of the cork?

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Steel balls sink in water but they don’t sink in mercury. Why?
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Steel balls sink in water but they don’t sink in mercury. Why?

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A helium filled balloon rises to a certain height and then halts. Why?
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A helium filled balloon rises to a certain height and then halts. Why?

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What are the drawbacks of simple pendulum?
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What are the drawbacks of simple pendulum?

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If a cork is released from the bottom of a jar filled with water, what will happen and why?
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If a cork is released from the bottom of a jar filled with water, what will happen and why?

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Explain why a man carrying a load on his back leans forward?
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Explain why a man carrying a load on his back leans forward?

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If a pendulum clock is taken to a mountain top, does it gain or lose time?
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If a pendulum clock is taken to a mountain top, does it gain or lose time?

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Why bridges are declared unsafe after a long use?
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Why bridges are declared unsafe after a long use?

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Suppose two forces act on rigid body and two forces have same magnitude but opposite direction. what conditions the body rotate?
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Suppose two forces act on rigid body and two forces have same magnitude but opposite direction. what conditions the body rotate?

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If the earth is struck by meteorites, the earth will slow down slightly. Why?
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If the earth is struck by meteorites, the earth will slow down slightly. Why?

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A rigid, lighter than air balloon filled with Helium cannot continue to rise indefinitely. Why?
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A rigid, lighter than air balloon filled with Helium cannot continue to rise indefinitely. Why?

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Explain why spokes are fitted in the cycle wheel.
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Explain why spokes are fitted in the cycle wheel.

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