English Exercise: Complete The Gaps Using Expressions Given Below

English Exercise: Complete the gaps using expressions given below.

When a ……vehicle…….. starts from a standstill (zero velocity, in an ……inertial frame of reference……..) and travels in a straight line at increasing speeds, it is ………accelerating………. in the direction of travel. If the vehicle turns, an acceleration occurs toward the new direction and changes its ……reference………….. The acceleration of the vehicle in its current direction of motion is called a …linear…………. (or tangential during ……crircular motions……………) acceleration, the ………reaction…… to which the passengers on board experience as a force pushing them back into their seats. When changing direction, the effecting acceleration is called radial (or orthogonal during circular motions) acceleration, the reaction to which the passengers experience as a …………centrifugal force.