1.

Your Physics book has a mass of 400g It is kept on a horizontal table. Taking g = 10m/s square, find the force ( both magnitude and direction ) exerted by the table on the physics book

Answer»

solution: MASS of physics book(m) = 400g= 0.4kg

g= 10m/s²

according to Newton's third law of MOTION every action has equal and opposite reaction.

force DUE book on table.

F= mg= 0.4×10=4N

in downward direction so the force on book by table is equal in magnitude but opposite in direction.

F=-F

table EXERT 4N force in upward direction.



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