Read statement below carefully, and state, with reasons, if it is true or false: During rolling, the force of friction acts in the same direction as the direction of motion of the CM of the body.

False. Explanation: Frictional force acts opposite to the direction of motion of the centre of mass of a body. In the case of rolling, the direction of motion of the centre of mass is backward. Hence, frictional force acts in the forward direction.

Read statement below carefully, and state, with reasons, if it is…

In a progressive wave, what is the path difference between a node and the antinode immediately following it. And phase difference?

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Chlorine and carbon dioxide gases are maintained at 27°C. Which gas will have higher average molar kinetic energy of translation and why?

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Choose the correct alternative: Acceleration due to gravity increases/ decreases with increasing altitude.

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What is the acceleration of a body falling through a viscous medium after terminal velocity is reached?

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If earth were to shrink suddenly, what would happen to the length of the day?

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If all the particle of a system lie in a cube, is it neccesary that the centre of mass be in the cube?

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Minimum velocity of body at lowest point looping in vertical circle of radius r is ________.

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A small creature moves with constant speed in a vertical circle on a bright day. Does its shadow formed by the sun on a horizontal plane move in a simple harmonic motion?

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Is it necessary to do work to maintain a constant velocity with a body on a rough surface?

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On what factor does the pressure at any point in a liquid depend?

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