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# grade11

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How does ‘g’ at a point vary with distance from the centre of the earth? Where is the highest value of ‘g’? Explain.
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How does ‘g’ at a point vary with distance from the centre of the earth? Where is the highest value of ‘g’? Explain.

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How does K.E. of an object change if its momentum is doubled?
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How does K.E. of an object change if its momentum is doubled?

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A solid tied at the end of a string is revolved in vertical. At what point the tension in the string will be the greatest?
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A solid tied at the end of a string is revolved in vertical. At what point the tension in the string will be the greatest?

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When a bus takes a turn, passengers are thrown away from the centre of the curved path. Why?
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When a bus takes a turn, passengers are thrown away from the centre of the curved path. Why?

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The earth moving round the sun actes upon by a force, the work on earth by this force. Do you agree with this statement?
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The earth moving round the sun actes upon by a force, the work on earth by this force. Do you agree with this statement?

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Explain why a cyclist bend while going along curved road?
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Explain why a cyclist bend while going along curved road?

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Why are roads banked on curved path?
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Why are roads banked on curved path?

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Distinguish between conservative and non-conservative force.
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Distinguish between conservative and non-conservative force.

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Differentiate between conservation of kinetic energy and conservation of linear momentum.
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Differentiate between conservation of kinetic energy and conservation of linear momentum.

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In a siphon, water is lifted above its level during flow from container to another, where does it needed potential energy from?
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In a siphon, water is lifted above its level during flow from container to another, where does it needed potential energy from?

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Explain how Newton’s first law of motion follows from the second law.
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Explain how Newton’s first law of motion follows from the second law.

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Explain why a coin placed on a cardboard covering a glass falls into the glass when the cardboard is pulled to one side?
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Explain why a coin placed on a cardboard covering a glass falls into the glass when the cardboard is pulled to one side?

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Why is it easy to pull a lawn roller than to push it?
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Why is it easy to pull a lawn roller than to push it?

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Why is the kinetic friction less than the limiting friction?
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Why is the kinetic friction less than the limiting friction?

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When a heavy truck collides with a car, the occupants of car are more likely to be hurt than the truck driver. Why?
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When a heavy truck collides with a car, the occupants of car are more likely to be hurt than the truck driver. Why?

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