They need extra holding force to stay in the nucleus.

Levers and pulleys often need a little extra force before they work.

He said that extra force alone was not the answer and that political measures were needed to get the country back to work.

"I am not sure that there will be a need for any extra forces," he said.

Being strong enough to withstand the extra forces generated in some activities/crashes.

Yet whatever his confident denial, there is an extra force in these latest accusations.

It did not, but it may have contributed some extra force.

Strait shook his hand, and Web felt the extra force the man gave to the grip.

We constituted the main military arm of our people, an extra force to come hi whenever and wherever needed.

It touched the deck with extra force- more than just gravity.