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This velocity is usually higher than the original speed of the projectile, and cannot be obtained in the test of stillness target.

The calculation of the collision probability in the case of the lower relative velocity was also discussed.

Weather or not there is a rolling as well as rubbing motion, and the relative speeds of moving parts, also need to be considered.

A liquid drop removed from a sheet or jet may be exposed to the aerodynamic pressure effect of a high relative gas velocity.

Rotation of the fiber bundle increases the relative velocity between the fluid and the hollow fibers and increases the mass transfer.

We are seated in one of the trains, and with us we have a special speedometer that measures their relative speed.

The paper discusses the method of determinating the cam profile, with roller or plat-faced follower, by means of instantaneous centers.

This method established is applicable to collision probability problem involving relative velocity and error covariance changing with time.

City Safety uses a laser sensor fitted behind the windscreen to scan the road ahead, calculating relative speeds and distances.