Question

A 14 N brick is sitting on a table. What is the normal force supplied by the table?

Answer 1

It should be equal in modulus to `14N`

Explanation:

The weight `W=14N` of the brick is balanced by the normal reaction `N` (it doesn't crash through its surface and doesn't fly away from it) so we can say that:
`N=W`
in numbers:
`N=14N` upwards, i.e., in a direction opposite to the one of the weigth.

Be careful because It is possible to confuse the symbol for the normal reaction and the one for the units of force, Newtons.