Question

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

Answer 1

Answer:

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:

$F_{total}=F_{1}+F_{2}+F_{3}=0$

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:

$12-21+F_{3}=0$

$-9+F_{3}=0$

$F_{3}=9\: N$

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

I hope it helps you!