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IB SEHS Topic 10: Friction & Drag UPDATED ACTUAL Exam Questions and CORRECT Answers

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IB SEHS Topic 10: Friction & Drag UPDATED ACTUAL Exam Questions and CORRECT Answers Friction - CORRECT ANSWER - Force that acts parallel to the interface of two surfaces that are in contact, and opposes their relative motion. Force of Friction - CORRECT ANSWER - Ff = μR Force of friction = Coefficient of friction x Normal reaction force Static Friction - CORRECT ANSWER - the force that resists the initiation of sliding motion between two surfaces that are in contact and at rest

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MGRADES


IB SEHS Topic 10: Friction & Drag
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Friction - CORRECT ANSWER - Force that acts parallel to the interface of two surfaces
that are in contact, and opposes their relative motion.


Force of Friction - CORRECT ANSWER - Ff = μR
Force of friction = Coefficient of friction x Normal reaction force


Static Friction - CORRECT ANSWER - the force that resists the initiation of sliding
motion between two surfaces that are in contact and at rest
Eg. Friction to keep tennis racket in hand


Dynamic Friction - CORRECT ANSWER - Frictional force that develops between two
surfaces in contact that are moving or sliding relative to each other; sliding friction; kinetic
friction.
Eg. Skiing


coefficient of friction - CORRECT ANSWER - the ratio of the force of friction to the
normal force acting between two objects
µ = Ff R


What does the magnitude of the coefficient of friction depend on? - CORRECT
ANSWER - Magnitude depends on the materials in contact


Eg. steel on ice (in ice-skating) has a low coefficient of friction


Eg. Rubber sole on ground (running) has a high coefficient of friction

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