No links pls A force is simple a or a .

The SI unit for force is .

When the net force on an object is not zero newton, the forces are said to be .

When 2 forces act in opposite directions, you (add, subtract) the forces.

a force is simply a push or pull.

The SI unit for force is Newton(N) or kgm/s2

When the net force on an object is not zero the forces are said to be unbalanced since they do not cancel out each other .

When two forces act in opposite directions we substract the forces in order to get the resultant force acting on the object.

Explanation:

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )