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CHAPTER 5: USING NEWTON'S LAWS: FRICTION, CIRCULAR MOTION, DRAG FORCES…
CHAPTER 5: USING NEWTON'S LAWS: FRICTION, CIRCULAR MOTION, DRAG FORCES
Application of Newon's Law Involving Friction
Static Frictional Forces
Fk = μkFN
Kinetic Friction Forces
Fsmax = μsFN
Highway Curves: Banked and Unbanked
Banked
Unbanked
Velocity Dependant Forces: Drag and Terminal Forces
When the drag force on the falling object is proportional to its velocity. The object gradually slows until the drag force and gravittional force equal.
The object force falls with constant velocity which is known as terminal velocity.
Dynamics of Uniform Circular Motion
An object moving on a circular path of radius at a constant speed.
Velocity vector is always tangent to the circle
Uniform Circular Motion- Kinematics
ar = v2r = ω2r
particle moving in a uniform circular motion
Velocity is changing at every instant.
There is no tangential acceleration.
Speed is constant
Radical (centripetal) acceleration = ω2r
v=ωr
Non- Uniform Circular Motion
Used for an object moving in a curved path as any small segmentn of the path will be circular.
Angular velocity is not constant
