Post on 23-Jun-2015
WE CANNOT DISSOCIATE OURSELVES FROM THE WORLD OF
It is a way of THINKING.
It is the science of matter, energy, and its interactions.
It is EVERYWHERE!By: Khryzia Beatrize P. Montalbo
Aristotle generalized the common sense notion that an object cannot undergo motion without something that causes it to move as it does.
Galileo reasoned that an objectwill continue to move with constant
velocity if no external force acts to affect this motion.
This became the basis of the laws of uniformly accelerated motion.
*Their works were focused on the description of motion, while Newton’s study of motion was centered on the force that
causes the different states of motion of an object.
ARISTOTLE vs. GALILEO
Scalar quantity – has magnitude (a number and a unit of measure) onlyVector quantity – has magnitude and direction
*The resultant vector represents the sum of two or more vectors.
MEASUREMENTS and VectorsMeasurement is the process of comparing a quantity
with a chosen standard.Accuracy is the closeness of the value to the exact value.
Precision is the closeness of two measurements to each other.
Base Units - also known as fundamental units
Derived Units- obtained from the combination of fundamental properties
KINEMATICS DESCRIBES
QUANTITATIVELY HOW A BODY MOVES
THROUGH SPACE.
DYNAMICS ACCOUNTS FOR THE OBSERVED MOTION IN TERMS OF FORCES, ETC.
MOTION CONTINUOUS CHANGE OF POSITION WITH RESPECT TO A REFERENCE
POINT
Distance – total length coveredDisplacement – length from starting to final point
Speed – distance traveled by an object in a given time Velocity – rate of change of displacement
Acceleration – rate of change in velocity
PROJECTILE MOTION
-is a combination of vertical and horizontal motions that are completely independent of each other
-is the motion of a body with a constant acceleration
Projectile – is an object or body thrown with an initial velocity and whose motion is influenced by the pull of gravity
Trajectory – is the path of a projectile. It is determined by 2 types of motion: vertical and horizontal motions.
GIF Source: Physics Classroom
Air ResistanceAir is a source of friction (air
resistance). Too much air resistance is a hindrance to moving fast. The amount of air resistance depends on the size and shape of the object and on its
velocity.
ForcesBalanced Forces – equal forces that act on an object in
opposite directions, no acceleration, 0 net force; constant velocity or at rest
Unbalanced Forces – if one of the forces is greater that the other, may cause an object to start moving, change
speed, stop moving, or change direction.
Example Images from Physics Classroom
4 Fundamental Forces
1.Gravitational Force2.Electromagnetic Force3.Strong Nuclear Force4.Weak Nuclear Force
Torque = F x d┴
Newton’s Laws of Motion
First Law: Law of InertiaInertia – tendency of an object to persist in its state of rest or uniform
motion in a straight line
* An object in motion continues to be in motion while an object at rest remains at rest unless acted upon by an
external force. *
GIF Source: Physics Classroom GIF Source: www.bergentechstudents.org
Sir Isaac Newton
Second Law: Law of Acceleration
Acceleration ∝ Net ForceW= mg
* A net force acting on a body produces an acceleration which is in the direction of the force. This acceleration is
directly proportional to the force, and inversely proportional to the mass of the body. *
Image Source: dcpspublic.oncoursesystems.com
Third Law: Law of Interaction
Action Reaction
* For every force applied to a body, there is an equal and opposite force given back to the body. These two forces do not balance each other because these are not exerted on the
same body. *
Image Source: Physics Classroom
Image Source: physics.tutorvista.com
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