Kinetic/Potential Energy
Define Kinetic Energy
energy in motion
Which has more GPE a 3.3 kg book at 4 meters or a 2.3 kg paperweight at 8 m in height?
Paperweight= 129.492 J or 129 J
What is energy?
capacity for doing work
What is GPE measured in?
Joules.
What is the rate of gravity?
9.81 m/s2
Define Potential Energy:
stored energy
What is the GPE of a 7 kg block 12.4 m above the floor?
851.508 J or 852 J
FOOD.
What is mass measured in?
grams or kilograms
Where is gravity located?
All around us on Earth.
What are ways Potential Energy look like?
sitting, resting, waiting.
What is the GPE of a 11 kg rock that is 121 m above the earth?
13,057.11 J or 13,057 J
Give 1 example on how KE transforms to PE?
What is height measured in?
meters
The force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.
What are ways Kinetic Energy looks like?
heat, speed, movement
A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the mass of the loaded cart is 2.7 kg and the height of the seat top is 0.88 meters, then what is the potential energy of the loaded cart at the height of the seat-top?
23.30856 J or 23 J
What is the Law of Conservation of Energy?
Energy is neither created nor destroyed, only changes form.
What is gravity measured in?
m/s2
Why is gravity important?
We could not live on Earth without gravity. It makes us be able to live, drive, walk on this planet. Gravity helps keep the oceans down and creates tides.
At the top of the hill before you go down.
The empire state building is 443.2 m from bottom to tip. What is the GPE if a quarter that weighs .27 g falls from the top?
1,173.9 J or 1,174 J
How does the sun give energy?
We can use its rays to help gain solar energy to power homes and give electricity.
Gives plants energy to grow.
What is one tool that measures mass?
triple beam balance
If I were to drop a bowling ball and a feather at the same time at the same height? Which object would hit first? What would be the rate at which it falls?
Bowling ball because air does not affect the bowling ball like it would the feather. They both would fall at the rate of 9.81 m/s2