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MECHANICS LECTURE 5 : APPLICATION OF NEWTON'S LAW - Coggle Diagram
MECHANICS LECTURE 5 : APPLICATION OF NEWTON'S LAW
Application of Newton's Laws Involving Friction
KInetic Friction (sliding friction)
Ffr=µkFn
µk= coefficient of kinetic friction. (different for each pair of surfaces)
Static Friction (two surfaces at rest)
Ffr=µsFn
µs=coefficient of static friction
Ffr≤µsFn
µ=tanθ
Non-Uniform Circular Motion
If an object is moving in a circular path but at varying speeds, it must have a tangential component to its acceleration as well as the radial one.
VT=mg/b
Uniform Circular Motion-Kinematics
Motion in a circle of constant radius at constant speed
Instantaneous velocity is always tangent to the circle
Centripetal acceleretaion, ac=v^2/r
acts toward centre of circle
v=2πr/T
Angular frequency ,w=2πf
1 Hz= 1 RPS
Centripetal force, Fc=mv^2/r
The resultant force that acts towards the centre of circular motion