A force is needed to push the light in the forward direction.

He stepped up in the pocket when force was needed.

Privately, the same soldiers and officers say American forces will be needed here for at least three to five years.

In a sharp turn, sideways force is needed to make the car change direction.

Therefore, the forces needed to cause a fracture have to be fairly strong.

Rwanda has said the force is no longer needed.

Police officials were quick to note that deadly force would be needed in some situations.

But the Senator said that by exerting pressure, force might not be needed.

A much larger force would be needed to invade Serbia itself.

He felt a strong force was needed there, in case the enemy broke through.