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# physicsquestions

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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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Why is easier to lift a body in a liquid than in air?
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Why is easier to lift a body in a liquid than in air?

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What are centre of buoyancy and metacentre?
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What are centre of buoyancy and metacentre?

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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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How will you justify that stone is more rigid than iron?
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How will you justify that stone is more rigid than iron?

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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?

#physicsquestions #grade11
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Does a ship sink more in river water or in sea water? Explain.
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Does a ship sink more in river water or in sea water? Explain.

#physicsquestions #grade11
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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?

#physicsquestions #grade11
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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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Explain which one is more elastic- rubber or steel.
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Explain which one is more elastic- rubber or steel.

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A fan with blades takes longer time to come to rest than without the blades. Why?
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A fan with blades takes longer time to come to rest than without the blades. Why?

#physicsquestions #grade11
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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?

#physicsquestions #grade11
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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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A dancer girl is rotating over a turntable with her arms outstretched. If she lowers her arms how does this affect her motion?
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A dancer girl is rotating over a turntable with her arms outstretched. If she lowers her arms how does this affect her motion?

#physicsquestions #grade11
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Why a wrench of longer arm is preferred in comparison to a wrench of short arm?
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Why a wrench of longer arm is preferred in comparison to a wrench of short arm?

#physicsquestions #grade11
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