転ころがり摩ま擦さつ

こ

ろ

が

り

ま

さ

つ

Meanings

1

noun

rolling friction

physics

Physics term for the resistance that occurs when an object rolls over a surface.

revolve, turn around, change

摩chafe, rub, polish

擦grate, rub, scratch

滑すべり摩ま擦さつ
Sliding friction, which occurs when two surfaces slide against each other, as opposed to rolling.
静せい止し摩ま擦さつ
Static friction, the force that keeps an object at rest when a force is applied.

Compound of 転がり (korogari, 'rolling') + 摩擦 (masatsu, 'friction').