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# Motion 🚗 (Kinematics)

Updated: Oct 23, 2019

MOTION 🚗

​Motion (or kinematics) is the study of moving objects. Its one of the bases of Physics since everything is moving, from insects to galaxies. But for us to understand Kinematics we should know the definition and differences between some terms, such as:

● Vector: Quantities that have both magnitude and direction

● Scalar: Quantities that have only magnitude and no direction

● Distance: Total ground covered (Scalar)

● Displacement: The distance relative at fixed reference point (It is a Vector)

● Speed: The rate of change of distance with time relative to a moving object (Scalar)

● Velocity: The rate of change of displacement with time relative to a moving object (Vector)

● Acceleration: The rate of change of velocity with time (Vector)

● Mass: Quantity of matter in an object

● Weight: The mass of a body relative to the gravity

The equations for the motion are what we call SUVAT equations and should always be according to International System (SI):

S = Displacement (meters; m)

U = Initial velocity (meters per second; m/s)

V = Final velocity (meters per second; m/s)

A = acceleration (meters per second square; m/ s2 )

T = Time (seconds; s)

The motions equations will always come from the relation between those five terms and the four main equations are:

EXAMPLE ==> How long would a car traveling at 90km/h take to arrive at a point 200 meters away?

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Reference :

Physics for the IB Diploma Second Edition, Contributions by Christopher Talbot, By (author) John Allum

Image credit: http://blogs.discovermagazine.com/d-brief/2018/10/01/27440/

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