'types of forces' is correct and usable in written English.
For example, "In physics, four fundamental types of forces govern the way objects interact with one another."
This chapter shows two types of forces acting on piles.
Several types of forces can be used to manipulate micro- and nanoscale objects, including optical and electrical forces.
They may be subjected to several types of forces acting, most often bending and shearing forces.
A theorem and related corollaries, applicable to systems involving general types of forces, are obtained.
The technique is computationally simple and can be applied to systems involving general types of forces.
"We have to change our military structure radically, establish cooperation between our different types of forces and improve our reconnaissance," he said.
But these gaps were also consistent across many different types of force.
Humans use two different types of force to drive home a screw or release it.
The results indicate that the different types of force are closely related.
There are different types of force plates and varying sampling rates.
The effect of three types of forced circulating air (up, down and up-down) on the unit performance is considered.
