DO NOW
 Part 1: Define Energy. What is the
difference between Kinetic and Potential?
 Part 2: Label each picture as Potential or
Kinetic
Which of the following has
more kinetic energy?
A sports car traveling at 27
m/s (60 mph)
A Semi-Truck traveling at
27 m/s (60 mph)
Which of the following has
more kinetic energy?
A hockey puck traveling at
36 m/s (80 mph
A hockey puck traveling at
45 m/s (100 mph)
Which of the following
object has the most kinetic
energy?
 A baseball traveling at 80 mph (36 m/s) or a
golf ball traveling at 100 mph (45 m/s) ?
 TURN AND TALK
DO NOW (s)
What two factors
contribute to kinetic
energy?
Kinetic Energy
 Two factors effect the amount of
kinetic energy an object has:
 Mass
 Velocity
Kinetic Energy (KE) = ½ mass (m) X velocity (v) 2
Potential Energy
 Potential energy is the energy of position or
stored energy .
Which one has more potential
energy?
 A 10 pound rock on a 50 meter cliff
 A 10 pound rock on a 100 meter cliff
 Why?
Which has more potential
energy?
 A penny at the top of
the Empire State
Building
 A grand piano at the top
of the Empire State
Building
 Why?
Which has more potential
energy?
 A penny from the top
of the Cinderella’s
Castle. (58 m)
 A book from the top
of a Sleeping Beauty’s
Castle (23 m)
 Turn and Talk
Weight vs. Mass
Gravitational Potential
Energy
 Two factors that effect gravitational potential
energy:
 Weight (mass *gravity)
 Height
 Potential Energy (PE) = weight x height
Example
 A waterslide is 30 meters tall. Both Ariana and
Paul are going the ride the slide.
 Ariana is 80 pounds ( 36 kg)
 Paul is 100 pounds (45 kg)
 Who has the most potential energy?
Example
 Franklin is going skiing with his family. He
decides he is going to try both the red
triangle (23 m) and the black diamond trial
(40 m). Franklin weighs 93 pounds (42 kg).
 Calculate the potential energy Franklin has at
both positions.
Ticket to Leave
1. What contributes to the calculation of
kinetic energy?
2. What contributes to the calculation of
potential energy?
3. What is the difference between weight and
mass