1. work, energy and power
Motivation and
Porch
Aperseption
CS/BC Cycling is a healthy
activity.
Indicator Pedal a bike that
requires a power play.
Materials Strength is what is
called energy.
Exercise
then
work, energy and
Finished power will be
discussed in this
You”ll Never chapter.
Walk Alone
Happy learning!
tempo dulu

2. CS and BC
Porch COMPETENCY STANDARDS:
CS/BC Analyze natural phenomena and their arrangement
within the scope mechanics object point
Indicator
Materials
BASIC COMPETENCE:
Exercise
Analyze the relationship between works, changes in
Finished
energy with the law of conservation of mechanical
energy
You”ll Never
Walk Alone

3. Indicator
Porch
CS/BC Students can calculate the
Indicator
potential energy and the kinetic
Materials
energy.
Exercise
Finished
You”ll Never
Walk Alone

4. WORK
Porch
work are the product of force by
CS/BC the displacement of an object.
Indicator
Materials
Exercise
initial position
W = Fs cos 0 = Fs (1) = final position
Fs
Finished
You”ll Never
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5. Porch
CS/BC
Indicator sound
radiant Electrical chemical
Materials
Exercise
Finished
thermal nuclear mechanical magnetic
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6. ENERGY
Porch
Energy is a quantity that is quite
CS/BC important, because energy can not be
separated from work. Moving objects
Indicator and stationary objects turned out to
Materials save energy
Exercise
The energy generated by movement of
Finished the object is called kinetic energy
You”ll Never
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7. kinetic energy
V1 V2
Porch
F F
CS/BC
Indicator
s
 W=Fs
Materials
 W = (m a) s
Exercise
 remember:
Finished v22 = v12 + 2as → as = ½ v22 – ½ v12
 W = m ( ½ v22 – ½ v12 )
You”ll Never
Walk Alone  W = ½ m v22 – ½ m v12
 W = Ek2 – Ek1
 W = ∆ Ek

8. ENERGY
Porch Energy stored in a stationary
object at a certain height-
CS/BC
called potential energy.
Indicator mathematically formulated as
Materials follows:
Exercise
Finished
EP = m x g x h
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9. Porch
CS/BC
Indicator
Materials
Exercise
F s = ½ m v2
Finished
F X 1000 = ½ 20000 X 402
F = 16000 N
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10. Exercise
Porch
1. Kinetic energy possessed a bullet of mass 0.05 kg and
CS/BC traveling at 100 m / s is........
a. 2,5 J d. 2500 J
Indicator b. 250 J e. 25 000 J
c. 250 J
Materials
2. Coconut fruit 1kg mass at an altitude of 12 meters from the
Exercise ground has potential energy for....
a. 0,12 J d. 120 J
b. 1,2 J e. 1200 J
Finished
c. 12 J
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11. thank you
for attention
Porch
CS/BC
Indicator
Materials
Exercise
Finished
You”ll Never Walk Alone