Ppt linear motion

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LINEAR MOTION

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SEPTIN DIAN PUSPITA

09330206

5E


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STANDARD OF COMPETENCE

Applying the concept and basic principles of kinematics and dynamics of the object point


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BASIC COMPETENCE

Analyzing the physical quantity of motion with constant velocity and acceleration


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INDICATOR1. Describes the definition of motion

2. Analyzing the physical quantities on the motion with constant velocity.

3. Analyzing the physical quantities on the motion with constant acceleration

4. Analyzing straight-line motion with constant velocity and straight-line motion with constant acceleration


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Motion is the shift of an object from one

position to another position. An object is

condicered moving when its position to a

reference changing point changes. Straight

motion is the motion of an object that tracks a

straight line.

DEFINITION MOTION

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Displacement

Displacement is distance moved inthe particular direction.

displacementA B

x1 x2

Distance scalar quantity

Distance is the total length of travel irrespective of the direction of motion.

5 m

5 m

A B

Example:

An object motion from A to B (5 m)

and later on it turns to A and stops

displacement(x) = 0

distance = 5m + 5m =10m


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velocity vector quantity

Velocity is defined as the rate of change of displacement.

average velocity is the ratio of the total displacement to the total displacement

Speed Scalar quantity

Speed is defined as the distance traveled per unit of time.


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Acceleration vector quantity

Acceleration is defined as the rate of change of velocity.


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Linear motion with constant velocity(uniformly motion)

Motion of an object with a linear motion trajectory and constant

velocity (motion of an object on a straight trajectory at each time

interval in which the same object the same distance).

0

x0

x

t 0

V = constant

v

tX = x0 + vt v=constant

acceleration (a) = 0

distance velocity


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Graph distance(x) – time(t)

Graph velocity(v) – time(t) Graph acceleration(a) – time(t)

GRAPH LINEAR MOTION WITH CONSTANT VELOCITY(uniform motion)


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LINEAR MOTION WITH CONSTANT ACCELERATION(uniformly accelerated motion)Motion of an object with a linear motion trajectory with a velocity change regularly.

acceleration

0

a = constant

a

ta=constant

x

tx = x0 + v0t + ½ at2

Position

v

tv = v0 + at

velocity


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Jarak (s) kecepatan (v) Percepatan (a)

Jarak (s) – waktu (t) kecepatan (v) – waktu (t) percepatan (a) – waktu (t)

x = vo.t + ½ at2 v= vo + at a = (v/vo) : t

vo2 = v2+ 2as

Graph uniformly accelerated motion is accelerated( + a )


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Jarak (s) kecepatan (v) Percepatan (a)

Jarak (s) – waktu (t) kecepatan (v) – waktu (t) percepatan (a) – waktu (t)

x = vo.t - ½ at2 v = vo - at a = (v/vo) : t

v2 = vo2- 2as

Graph uniformly accelerated motion is slowed (-a)


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EXERCISEA van travels with velocity of 27km/hour. Then, it is accelerated of 2m/s². calculate velocity and distance traveled in 5 second after the van being accelerated!

a=2m/s²

= 7,5 + 2 . 5

= 17,5 m/s

= 62,5 m


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REFFERENCE• Purwoko, Fendi. 2009. Physic 1 for Senior High

School Year X. Jakarta : Yudistira. • Marten Kanginan. 2002. Physics 1. Jakarta :

Erlangga.• Team MGMP Physic Senior High School. 2006.

Worksheet Senior High School Physic X. Jakarta : Multigrafika.


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DEVELOPMENT

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