These forces are complex and vary within the cell.

The forces used to carry out the tactical assignments varied from 1933 to 1943.

Individual forces vary considerably in their effectiveness and respect for human rights.

He found the force varied and changed polarity with the lunar cycle.

If r is the distance between the centers of two masses, we say that the gravitational force varies as 1/r2.

However, the force of pent-up demand varies from one area to another.

"The forces that run in American politics in our age are many and varied," he wrote.

The attacking forces varied in size from a few paratroopers to operations involving several companies.

The force to push a car down the road varies with the speed the car is traveling.

Well, of course: as the gravitational force varied, so did the need for acceleration.