Potential Energy
What is Potential Energy?
Stored Energy
What is Kinetic Energy?
Movement Energy
What is Work?
Energy Cost of Action
How can you find work from a graph?
On average, how often does a solar eclipse happen?
Every 1-3 years
What is the equation for potential energy?
PE=mgh
What is the equation for Kinetic Energy?
KE=1/2 mv^2
What is the equation for Work?
Work = Fd
What type of graph can you find work from?
A Force vs Displacement graph
Why can't you look at a solar eclipse?
How much gravitational P.E. does an object have when it is on the ground?
How much K.E. does an object have right before it is dropped of a building?
0
How much work is done when you are carrying groceries?
0J
How can you find the change of K.E. from a graph?
Find the Area
Why doesn't a solar eclipse happen more often?
The moon is not in the same plane as the sun and earth.
If a 7Kg object is 3m off the ground, what is its P.E?
210J
If a 4Kg object is moving at a speed of 3m/s, what is its K.E?
18J
If a 6N Force is applied to an object and it is moved 4m, what is the work done?
24J
What is the area of a triangle?
A=1/2 BH
The moon is much smaller than the sun, why is it able to completely block out the sun?
It is so close to earth
List another type of potential energy other than gravitational.
Spring P.E.
Can my maximum K.E. ever be greater than my maximum P.E.?
No, they are the same
Work is only done when the force being applied is in the _______ direction as the distance moved.
Same
What does Mechanical Energy look like on a graph?
A horizontal line
What is the longest a solar eclipse can last?
7 minutes and 29 seconds