friction
Friction opposes relative motion or attempted motion. This topic is part of Physics within Science & Nature. This page currently draws on 18 supporting questions, with answers and bonus facts available below.
friction trivia questions
Friction is a force that resists what?
Answer: Motion between surfaces
Bonus fact: Friction opposes relative motion or attempted motion.
Which type of friction acts before an object starts sliding?
Answer: Static friction
Bonus fact: Static friction prevents motion up to a maximum value.
Friction commonly converts mechanical energy into what?
Answer: Heat
Bonus fact: Microscopic interactions turn some motion energy into thermal energy.
What physical force allows ordinary friction brakes to slow a vehicle?
Answer: Friction
Bonus fact: Friction converts kinetic energy into heat.
What small components inside skateboard wheels reduce friction?
Answer: Bearings
Bonus fact: Ball bearings let wheels spin smoothly.
In real machines, some useful mechanical energy often becomes what because of friction?
Answer: Thermal energy
Bonus fact: Total energy is still conserved.
What substance is rubbed on violin-bow hair to increase friction?
Answer: Rosin
Bonus fact: Rosin helps the bow grip and release the string.
What cartilage covers the ends of bones in many movable joints?
Answer: Articular cartilage
Bonus fact: Articular cartilage reduces friction and absorbs shock.
Heavy rain can trigger landslides mainly by doing what?
Answer: Saturating and weakening soil
Bonus fact: Water can reduce friction and add weight to slopes.
How does a rubble-mound breakwater reduce wave energy?
Answer: By forcing waves through and over irregular rock
Bonus fact: Friction and turbulence dissipate energy.
On which part of the hand are fingerprint ridge patterns found?
Answer: Fingertips
Bonus fact: Friction ridges improve grip.
What membrane surrounds each lung and lines the chest cavity?
Answer: Pleura
Bonus fact: Pleural fluid reduces friction during breathing.