A 12 N force and a 21 N force are acting from a single point in opposite directions. What additional force must be added to produce equilibrium?

We need to add 9 N in the direction of F(1)

Explanation:

We know that in equilibrium the total force is equal to zero, so we have:

F(1) is 12 N

F(2) is 21 N in the opposite direction

F(3) is the additional force.

Then, using these values into the total force equation we have:

Therefore, we need to add 9 N in the direction of F(1)

I hope it helps you!

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000