Physics
Net force with friction
The force that actually accelerates the object is what is left after opposing forces are subtracted. To keep 3600 N of net force against 1000 N of friction, apply 4600 N.
The Formula
F_net = F_applied - F_friction
The force that actually accelerates the object is what is left after opposing forces are subtracted. To keep 3600 N of net force against 1000 N of friction, apply 4600 N.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| F_applied | Force you supply | newtons | In newtons, taken along the direction of intended motion. |
| F_friction | Opposing friction force | newtons | In newtons, proportional to the normal force and the coefficient of friction. |
What Each Symbol Means
F_appliednewtons
Force you supply
In newtons, taken along the direction of intended motion.
F_frictionnewtons
Opposing friction force
In newtons, proportional to the normal force and the coefficient of friction.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate force page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate Force, filed under Science. Every number the guide produces comes from substituting into this one line.