Kinetic and Potential Ex.
Kinetic Energy
Speed
Potential energy
Forms of Energy
100
What STATE of energy is pulling back a rubber band?
Is this potential or kinetic energy?
Potential Energy
100
Object that is moving has... (______) Energy.
Kinetic
100
What two pieces of information do you need to calculate the speed of something?
DISTANCE and TIME
100
A ball on top of a hill compared to a ball at the bottom of a hill has MORE or LESS PE?
MORE PE (higher object)
100
The state of energy that can be abbreviated with the acronym MELTS
Kinetic
200
A stationary roller coaster is at the top of the track. What kind of energy does it have?
Potential energy
200
Speed affects Kinetic energy; the faster the movement the ------- the kinetic energy.
the faster the movement the HIGHER the kinetic energy
200
What is the average speed of a ball that rolled 128 inches in 4 seconds?
32 inches a second
200
The equation to calculate gravitational potential energy is PE = mgh. What does each variable stand for?
m = mass
g = gravity
h = height
200
This form of energy measures HEAT
Thermal
300
Which point has the greatest kinetic energy?
Point B
300
friction is __________ energy being TRANSFORMED into _________ energy
kinetic to thermal (or heat)
300
In 6 seconds Tucker ran 48 feet. How fast was he running?
8ft per second.
300
I put a watermelon on top of a desk 5m off the ground. I then move that watermelon to the top of my fridge, which is 10m off the ground. Which spot gives it more PE? Why?
Top of the fridge because more height
300
The form of energy stored inside food and water
Chemical
400
How does friction slow down a roller coaster car?
It converts the kinetic energy to thermal energy.
400
As a roller coaster goes down a track, what happens to the PE and the KE?
The potential energy goes down, and the kinetic energy goes up
400
Speed is always measured by calculating ________ divided by __________
Distance divided by Time
400
Imagine I have two objects raised to the same height. One object weighs 25kg, the other weighs 10kg. Which should have MORE potential energy?
the 25kg object
The MORE mass the MORE Potential Energy
400
What are the five forms in MELTS?
Mechanical
Electrical
Light
Thermal
Sound
500
What point on the roller coaster has the GREATEST Potential energy and WHY?
Point A because it is the highest
500
If I increase the mass of an object that is moving, how does that change the overall SPEED and KE?
Speed and KE would go up
500
A cannonball is launched at 25m/s and travels for 30 seconds. How far does the cannonball go?
25*30 = 750m
500
How does potential energy determine total energy (or TE)?
The higher the starting point of an object, the more total energy it has in the system
500
What is it called when energy goes from one state to another, or one form to another?
Transfer or transformation