A: gravity
B: friction
C: pressure
D: surface tension
E: inertial force
举一反三
- Among the following forces, there is body force A: friction B: pressure C: surface tension D: inertial force
- Which forces belong to external forces(). A: spring force B: damper force C: actuator force D: gravity force
- n. the action of one object or surface moving against another; the resistance of one surface to another surface or substance moving over or through it A: gravity B: friction C: hydrogen D: governor
- In operation, the connecting rod is subjected to both ( ) and ( ) .（ ） A: inertia loads B: centrifugal force C: gravity D: gas pressure
- On the surface of the moon, the gravitational force(重力) on a body is only 1/6 what it is here on earth.
内容
- 0
The force on the metal plate of parallel plate capacitor is A: longitudinal tension B: lateral pressure C: unable to confirm D: zero
- 1
According to the passage, it is clear that the force of the moon ______. A: is not as important as that of the wind B: is less than half that of the sun C: is the primary cause of the alternate rise and fall of the surface of the seas D: does not influence the rise and fall of the surface of the seas
- 2
Which of the following are characteristics of tension joints?() A: unstable<br/>attitude B: straight<br/>and smooth joint surface C: jagged<br/>joint surface D: mostly<br/>filled by mineral veins
- 3
No force of gravity acts on an astronaut in an orbiting space station.
- 4
The internal forces in a thin plate under bending deformation include: A: bending moment B: twisting moment C: shear force D: axial force