Answer:
5N
book
table
upward
Explanation:
First, this question applies Newton's third law of motion. This states that an object experiences an equation and opposite reaction. In mathematical expression:
[tex]F_{a} = F_{N}[/tex]
where [tex]F_{a}[/tex] = action and [tex]F_{N}[/tex] is the reaction force.
The reaction is also called the Normal force since it acts perpendicular to the applied force.
The book experiences a reaction from the table.
The reaction is upward.
A book weighing 5 N rests on top of a table. A downward force of magnitude 5 N is exerted on the book by the force of normal reaction. Do the downward force in Part A and the upward force in Part B constitute a 3rd law pair? The reaction to the force in Part A is a force of magnitude 5N, exerted on the book by the table. Its direction is upwards.
According to Newton's third law of motion, for every action, there is an equation and opposite reaction.
W = N = 5N
where W is the weight of the book (action)
N is the normal force (reaction)
The reaction is also called the Normal force since it acts perpendicular to the applied force.
The book experiences a normal reaction from the table which is directed perpendicular upwards to the surface of contact.
Learn more about Laws of motion:
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