A book is on the table. If the weight of the book is 25 newtons, what is the magnitude and direction of the normal force?

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21-04-2017
Physics

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A book is on the table. If the weight of the book is 25 newtons, what is the magnitude and direction of the normal force?

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vadakkanap vadakkanap · Answer 1 · 2017-04-21T19:22:35+02:00

vadakkanap vadakkanap

21-04-2017

I'm not sure about the magnitude, but the direction of the normal force is upward.

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skyluke89 skyluke89 · Answer 2 · 2018-11-15T12:26:02+01:00

Magnitude : 25 N

Direction: upward

Explanation:

The weight of the book is 25 N and is directed downward: this is the force exerted by the book on the table.

As stated in Newton's third law, for every object A that exerts a force on an object B, object B exerts an equal and opposite force on object A.

In this case, object A is the book and object B is the table. Based on Newton's third law, we can say that the table exerts an equal and opposite force on the book: therefore, the magnitude of the normal force is equal to the weight of the book (25 N), while the direction is opposite (so, upward).