抗こう力りょく

noun

drag; fluid resistance

Physics term for the force opposing motion through a fluid (air or liquid).

• 抗こう力りょくは速そく度どの二に乗じょうに比ひ例れいする。

  Drag is proportional to the square of the velocity.

noun

reaction force; normal force and friction

Physics term for the force a surface exerts on an object in contact with it, including normal and frictional components.

• 物ぶっ体たいが机つくえの上うえにあるとき、机つくえから物ぶっ体たいに抗こう力りょくが働はたらく。

  When an object is on a desk, a reaction force acts on the object from the desk.