kinetic Energy

1. MOTIVATION: MINUTE TO WIN IT GAME

2. An object rolling
down a hill.
Muscles moving. A car moving.
What similarities do you notice
about all these examples?

4. KINETIC ENERGY
"Kinetic" means
movement!
Kinetic energy means the
energy in moving

5. EXAMPLES OF KINETIC ENERGY

8. WHICH OBJECT WILL GIVE A GREATER
IMPACT IF THEY FALL AT THE SAME SPEED?

10. NOTE!
“The greater the mass
of an object, the more
kinetic energy there will
be”.

11. WHICH ANIMAL HAS A GREATER KINETIC
ENERGY IF BOTH HAVE THE SAME MASS?

12. NOTE!
“The greater the speed
of an object, the more
kinetic energy there will
be”.

13. 1. How does a
wrecking ball
works?
2. How does the
mass of the
wrecking ball affects
its energy?

14. 3. How does the
speed of swing the
wrecking ball affects
its energy?
4. In the game
“Bottoms Up” which
object acted as the
wrecking ball?

15. FORMULA OF KINETIC ENERGY
K.E= mv2
2
K.E = ½ mv2
K.E is the
Kinetic
energy
m is mass
v is velocity

16. 5 STEPS IN SOLVING THE KINETIC
ENERGY OF MOVING BODY
A. Identify the given
B. Identify the required or unknown
C. Determine the formula that you will use
D. Write the values of the variable and
solve
E. Write the final answer

17. SAMPLE PROBLEM
1. A 3.0 kg. ball rolls on
the floor and has a
velocity of 10 m/s. What
is the kinetic energy of
the ball?

18. 2. A moving car has a
mass of 4,500 kg and a
velocity of 45 m/s. what
is the kinetic energy of
the car?

21. 1. Solve the problem using the 5 steps of
calculating the kinetic energy.
a.Given
b.Required
c.Formula
d.Solution
e.Answer

22. 2.Answer the guide
questions.
3.Choose one
representative to discuss
and present your output.

23. Group 1
What is the kinetic
energy of a 44 kg
cheetah running at
31 m/s?

24. Group 2
A 0.75 kg tennis ball has
a velocity of 15 m/s,
what is the kinetic
energy of the tennis

25. Group 3
A toy car moves with a
velocity of 15 m/s and has a
mass of 2 kg. How much is
the kinetic energy of the toy
car?

26. Group 4
A pencil rolls on the floor
at 3 m/s and has a mass of
0.25 kg, calculate the
kinetic energy of the

27. Group 5
A 30 kg boy runs at 18
m/s. How much kinetic
energy did the boy
gains?

28. 1. What is a kinetic energy?
2. In the problem, what object
gains the kinetic energy?
3. What are the units of kinetic
energy?

29. 4. What happens if the
velocity of a moving object is
doubled, its kinetic energy is
______?
5. What happens to the kinetic
energy if the mass of the

31. •What will be the formula if the
unknown is the velocity of the
object?
•What will be the formula if the
unknown is the mass of the
object?

32. OTHER FORMULA
m=
2KE v=√2KE2