frictional
part of speech
adjective (frictional) — (science)
meaning for a pupil
(science) Caused by or to do with friction, the force that slows things when surfaces rub together. tree →
sense in the lessons
In science lessons on forces: «frictional force» acts against movement; rough surfaces give more friction. Brakes, shoe grips and tyres use frictional forces. Frictional heat warms your hands when you rub them.
examples
- Frictional force slows the toy car on the carpet. tree →
- Rubbing your hands makes frictional heat. tree →
- Brakes use frictional forces to stop a bike. tree →
- The ice has less frictional force than the road. tree →
- Draw an arrow for the frictional force. tree →
- Frictional forces wear down shoe soles. tree →
note
Technical word. Noun: friction. Frictional force acts opposite to the direction of motion.
Trees and pragmatics
Every meaning and example of «frictional» parsed by Mova, each sentence with its dependency tree and frames.