ppt linear motion
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LINEAR MOTION
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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
MATERIAL
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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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