Friction Worksheet-4
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Does friction depend on smoothness of the surface?
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Which surface produces more friction?
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Which type of surface produces less friction?
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What is the direction of frictional force?
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What is the cause of friction between two surfaces?
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Which surface has more irregularities smooth or rough surface?
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How many types of friction?
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Which is less sliding friction or static friction?
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Which force helps to write by chalk on blackboard?
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Is it easier to hold an earthen pot or a glass tumbler?
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Why is it difficult to move on a wet marble floor?
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What does friction do to soles of our shoes?
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Why does a match stick catch fire when it rubbed on rough surface?
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What happens when there is no friction between the chalk and the board?
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What would happen when an object stated moving if there was no friction?
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What does friction produce?
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Write One harm of friction.
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Why does jar of a mixer become hot when it is run for few minutes?
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Why do the tires of cars and trucks are treaded?
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Why do Kabaddi players rub their hands with soil?
Answer:
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Yes
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Rough surface
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Smooth surface
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The direction of frictional force is the opposite to the motion.
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Irregularities of two surfaces in contact.
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Rough surfaces have more irregularities.
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There are two types of friction:
(i) Static friction (ii) Sliding friction.
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Sliding friction is smaller than the static friction.
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Frictional force.
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To hold earthen pot is easier than glass tumbler.
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Wet marble floor has less friction so it is difficult to move on it.
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It causes wear and tear in soles of our shoes.
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Match stick catches fire due to friction.
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We could not write on board.
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The object would never stop if there was no friction.
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Heat
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Friction wears out the materials like machine parts.
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The jar of a mixer becomes hot due to friction.
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The treaded tires of cars and trucks provide better grip with the ground.
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Kabaddi players rub their hands with soil for a better grip of their opponents. This way the friction is increased and it becomes easy to hold the hands of opponent.