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Mechanics CH3-CH6 - Coggle Diagram
Mechanics CH3-CH6
Chapter 4:Newton's Law of Motion
(Ch 4-1)Force
An object that is moving need a FORCE to change its VELOCITY.
Force is a Vector
Push or Pull
(Ch 4-5)Newton's Third Law of Motion
"Whenever one object exerts a force on a second object, the second exerts an equal force in the opposite direction on the first."
(Ch 4-2)Newton's First Law of Motion
"Every object continues in its state of rest, or of uniform velocity in a straight line, as long as no net force acts on it"
Example: The motion of a ball falling down through the atmosphere, or a model rocket being launched up into the atmosphere
(Ch 4-4)Newton's Second Law of Motion
"The rate of change of momentum of a body is directly proportional to the resultant force on it and is in the same direction as the resultant force"
Kicking a ball
Pushing a cart
(Ch 4-3)Mass
mass is not weight.
Mass is a property of an object.
Measured in kg.
(Ch 4-6)Weight
Known as the force exerted on an object due to gravity, g=9.8m/s.
The weight is always perpendicular to the normal force of the object.
Chapter 5:Using Newton's Law Friction, Circular Motion, Drag Forces
(Ch 5-4)Banked and unbanked curves
if the tires of the car will not slip from the track, the friction is static.
Kinetic Frictional force< Static frictional force
(Ch 5-1) Newton's Law Involving Friction
Static: Applies when two surfaces are at rest with respect to each other.
Kinetic: Different for each pair of surfaces.
(Ch 5-3)Dynamics of Uniform Circular motion
Net force should be acting on an object if uniform circular motion is present.
The centripetal force also known as centrifugal force always acts towards the center of the circle.
(Ch 5-2)Uniform Circular Motion
constant speed
constant radius
Instantaneous velocity always tangent to the circle.
Centripetal acceleration always acts towards the center of the circle.
Velocity:
(Ch 5-5) Nonuniform Circular Motion
speed is not constant
(Ch 5-6)Drag and terminal velocity
Drag force is proportional to its velocity
Chapter 6: Work And Energy
(Ch 6-4)Kinetic energy
Kinetic energy, form of energy that an object or a particle has by reason of its motion.
(Ch 6-2) Scalar Product of two vector
Scalar multiplication of two vectors yields a scalar product.
(Ch 6-3)Work done by varying forces
The work done is calculated with the help of Integration.
(Ch 6-1) Work done by a constant force
The work done on an object is the change in kinetic energy that that object experiences
unit is Joules
Work is a scalar product due to the dot product used in the formula to calculate work
(Ch 6-4)Work-Energy Principle
Work done by all forces acting on a particle equals the change in the particle’s kinetic energy.
Example of work energy theorem(
https://scrn.li/sAS3mFJ3EAF3r5
)
Chapter 3: Kinematics in 2D and 3D
Scalar
:straight_ruler:
Magnitude only
Scalar Product: A.B=lAl lBl cos (x)
Projectile Motion
:handball:
Horizontal Equation
The horizontal speed is always constant
x=dt
v=u+at
v(v)=u(u)+2as
s=ut+0.5at(t)
Vertical Equation:
The acceleration, g is always constant due to gravity g=-9.8ms
v(v)=u(u)-2gs
s=ut-0.5gt(t)
v=u-gt
Relative Velocity
:racing_car:
The velocity of an object moving with respect to other moving object
Vector
:checkered_flag:
Magnitude & Direction
Adding Vector
Adding vectors: Component Form
Vector Product : AxB = lAl lBl sin (x)
Unit vector
Vector Kinematics