Among the following forces, there are surface force （ ）
A: gravity
B: friction
C: pressure
D: surface tension
E: inertial force
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.