A book is kept on the surface of a table. If the gravitational pull of the earth on the book is the force of action, then the force of reaction is exerted by (a) the book on the table (b) the book on the earth (c) the table on the book (d) the table on the earth

Question ID - 50395 :- A book is kept on the surface of a table. If the gravitational pull of the earth on the book is the force of action, then the force of reaction is exerted by (a) the book on the table (b) the book on the earth (c) the table on the book (d) the table on the earth

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the table on the book

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A string is wound around a hollow cylinder of mass 5 kg and radius 0.5 m. If the string is now pulled with a horizontal force of 40 N, and the cylinder is rolling without slipping on a horizontal surface (see figure), then the angular acceleration of the cylinder will be (Neglect the mass and thickness of the string) :-