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A vector `vecA` has magnitude 2 and another vector `vecB` have magnitude 3 and is perpendicular to each other. By vector diagram find the magnitude of `2vecA +vecB` and show its direction in the

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What is the angular velocity of the hour hand of a

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A body is moving on a curved path with a constant speed. What is the nature of its

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The blades of an aeroplane propeller are rotating at the rate of 600 revolutions per minute. Calculate its angular

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The two ends of spring – balance are pulled each by a force of 10kg.wt. What will be the reading of the

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A soda water bottle is falling freely. Will the bubbles of the gas rise in the water of the

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A nucleus is at rest in the laboratory frame of reference. Show that if it disintegrates into two smaller nuclei, the products must be emitted in opposite

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A thief jumps from the roof of a house with a box of weight W on his head. What will be the weight of the box as experienced by the thief during

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Which of the following is scalar quantity? Inertia, force and linear

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Action and reaction forces do not balance each other.

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State and prove the principle of law of conservation of linear

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How is centripetal force provided in case of the following?(i) Motion of planet around the sun,(ii) Motion of moon around the earth.(iii) Motion of an electron around the nucleus in an

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Give the magnitude and direction of the net force acting on(a) A drop of rain falling down with constant speed.(b) A kite skillfully held stationary in the

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In which motion momentum changes but K.E. does

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Derive the expression for the potential energy stored in a

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A spring is kept compressed by pressing its ends together lightly. It is then placed in a strong acid, and released. What happens to its stored potential

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A ball is dropped from the height `h_1` and if rebounces to a height `h_2`. Find the value of coefficient of

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What is the position of centre of mass of a rectangular

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What is the moment of inertia of a sphere of mass 20kg and radius `1/4` m about its

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What are the factors on which moment of inertia of a body

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