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Two books are resting side by side, in contact, on a desk. An applied horizontal force of 0.58N causes the books to move together with an acceleration of 0.21m/s/s horizontally. The mass of the book to which the force is applied directly is 1.0kg. Neglecting friction, determine:

a.) the mass of the other book

b.) the magnitude of the force exerted by one book on the other.

Attempt:

Force is applied on Box A Box A applies force on Box B

Fnet = Fapp + F(BonA) ma = (0.58 N) + F(BonA) F(BonA) = -0.3 N F(BonA) = -F(AonB)

F(AonB) = 0.3 N

Fnet = Fapp + FAonB

m(0.21) = 0.58 - 0.3

m = 1.33 kg

a) The correct answer is 1.8 kg..am i doing something wrong? Any help is much appreciated! Thanks!!

Jessica
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1 Answers1

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HINT: Total mass = $\frac{F_{net}}{a_{net}}$. Internal forces can then be found by $F=ma$ on individual bodies.

L__
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