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# Normal Force of a Box Resting on Table

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A 15kg box sits on a table. It is not moving.

The force of gravity is equal to __Newtons.

The force of the table against the box is the ___force.

The force of the box against the table is equal to ___Newtons.

https://brainmass.com/physics/acceleration/normal-force-box-resting-table-10335

## SOLUTION This solution is FREE courtesy of BrainMass!

As you know, the earth attracts all bodies to its center.

According to Newton's law, force = mass * acceleration

here acceleration = 9.8 m/s^2 which is the acceleration due to gravity.

Since the body is resting on the table, it is acted upon by the force due to gravity which is acting downwards. The force on the body from the table, usually we call it as the normal force acts vertically up from the contact plane of the body and the table.

Or simply, the force of the table against the box is the normal force.

Since the body is at rest, no net force is acting on it. Thus the downward gravitational pull and the normal force balance each other.

Now we get the answer for the first two questions

a) The force of gravity is equal to, mass* acceleration =

= 15 * 9.8 = 147 Newton (Vertically downwards)

b) The force of the table against the box is the <b>NORMAL force</b>

c) The force of the box against the table is equal to mg (downwards)

and its magnitude given by F= 15 * 9.8 = 147 N

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!