
Conservation of energy lesson
Presentation
•
Physics
•
11th Grade
•
Practice Problem
•
Medium
+2
Standards-aligned
Sara Alattar
Used 7+ times
FREE Resource
8 Slides • 12 Questions
1
2
Law of Conservation of Energy
• Energy can be neither created
nor destroyed by ordinary
means.
• Energy Can be transformed or
transferred from one form to
another.
• The total amount of energy is
the same before and after any
transformation or transfer.
3
Multiple Choice
According to the law of Law of Conservation of Energy
Energy can be neither created nor destroyed by ordinary means
Energy can be created, but it cannot be destroyed
Energy cannot be created, but it can be destroyed
4
An objects’ energy can be:
All Kinetic Energy
All Potential Energy
A combination of both
5
Multiple Select
Any object can have________
Choose all correct answers
All Kinetic energy
All potential energy
A combination of KE and PE
Kinetic energy only in all circumstance
6
•AS velocity increases kinetic energy increases and
potential energy decreases
•As velocity decreases kinetic Energy decreases and
potential energy increases
7
Multiple Choice
•AS velocity ________ kinetic energy increases and potential energy decreases
increases
decreases
does not change
8
Example
As a basketball
player throws
the ball into the
air, various
energy
conversions
take place.
9
10
Multiple Choice
A small frog jumps over a rock of height 15 cm.
Which of the following statements is true about its motion
The potential energy of a frog is constantly changing during a jump. It is zero at the moment the frog jumps and increases until the frog reaches its maximum height
The potential energy of a frog is constantly changing during a jump. It is maximum at the moment the frog jumps and decreases until the frog reaches zero at the maximum height
11
Equations
• 𝑀𝐸 = 𝐾𝐸 + 𝑃𝐸
• 𝑀𝐸𝑖 = 𝑀𝐸𝑓
• 𝐾𝐸𝑖 + 𝑃𝐸𝑖 = 𝐾𝐸𝑓 + 𝑃𝐸𝑓
ME: mechanical energy
KE: kinetic energy
PE: Potential energy
12
13
Multiple Choice
What is the velocity at point A?
37 m/s
Zero
Cannot be calculated
14
Multiple Choice
Calculate the mass at point A?
37 kg
Zero
51 kg
15
Multiple Choice
PE at point B is _______
20,000 J
35,000 J
30,000 J
16
Multiple Choice
KE at point C= _______
20,000 J
35,000 J
zero
17
Multiple Choice
The height at point C= _______
15 m
30 m
10 m
18
Multiple Choice
Velocity at point C _______
37 m/s
Zero
51 m/s
19
Multiple Choice
PE at point D= _______
20,000 J
30,000 J
Zero
20
Multiple Choice
PE at point E= _______
20,000 J
30,000 J
Zero
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