CHAPTER 5: USING NEWTON'S LAWS: FRICTION, CIRCULAR MOTION, DRAG FORCES
Application of Newon's Law Involving Friction
Highway Curves: Banked and Unbanked
Velocity Dependant Forces: Drag and Terminal Forces
Dynamics of Uniform Circular Motion
Uniform Circular Motion- Kinematics
Non- Uniform Circular Motion
Banked
Unbanked
Used for an object moving in a curved path as any small segmentn of the path will be circular.
Angular velocity is not constant
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
Static Frictional Forces
Kinetic Friction 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.
Fk = μkFN
Fsmax = μsFN
An object moving on a circular path of radius at a constant speed.
Velocity vector is always tangent to the circle
The object force falls with constant velocity which is known as terminal velocity.