Which forces belong to external forces(). A: spring force B: damper force C: actuator force D: gravity force

The essence of internal force is the force between atoms.

[音频]Norcal Approach:Air Force 1, ____________Air Force 1:________Air Force 1Norcal Approach:...cleared ILS-X runway 16R approachAir Force 1: ________, cleared for ILS-X 16R Air Force 1

After simplification of any force system in space, a force and a couple are obtained. The magnitude of this force is ( ) the principal vector of the force system. A: equal to B: more than C: less than D: not equal to

She tried to calm herself, ________ . A: force B: to force C: forcing D: forced

The unemployment rate is calculated as A: [(labor force) ÷ (population)] × 100. B: [(unemployment) ÷ (population)] × 100. C: [(unemployment) ÷ (labor force)] × 100. D: [(labor force) ÷ (unemployment)] × 100.

force majeure

[音频]Norcal Approach:Air Force 1, contact Reno Tower ____ have a good dayAir Force 1:Air Force 1_______ tower, good day

I really have to ______ myself to be nice to him. （ ） A: force B: forceful C: forced D: be force

To describe a force, we only need to describe the magnitude that describe "how hard" the force pushes or pulls.