In science, energy is the ability to do work. Work is done when a force causes an object to move in the direction of the force. How do energy and work help you play tennis? The tennis player does work on her racket by exerting a force on it. The racket does work on the tennis ball, and the tennis ball does work on the net. When one object does work on another, energy is transferred from one object to another. Q. #’s 1 & 2.
Think about how energy can be transferred in a football game? During a soccer game? During a game of golf? On your paper give 2 energy transfers for each example. Ex.: Ball to Net A.A. B. C. Q # 3
Kinetic Energy is the energy of motion. All moving objects have kinetic energy. The faster something is moving the more kinetic energy it has. The more mass an object has, the more kinetic energy it has. Q #’s 4. & 5
Which item has more kinetic energy? A. A leaf falling from a tree or an apple falling from a tree? B. A four-year old running towards you or an NFL wide- receiver running towards you? C. A tennis ball shot out of a cannon or a bowling ball shot out of a cannon? Answer the Questions on your worksheet. Q. #6
Which has more kinetic energy? _______ a moving car or _______ a moving train _______an adult or _______a baby _______Niagra Falls or _______a running faucet _______an elephant or _______ a mouse _______ a car at 35 mph or _______ the car at 70 mph _______a tidal wave or _______ a regular wave _______a hurricane or _______ a tropical storm _______a boulder down or _______a pebble down a hill a hill _______a jogger or _______a sprinter #
Energy stored in elastic strings, springs, and elastic bands is called elastic potential energy. You can change the shape of these objects by stretching them. This stretching takes some effort. This work put into stretching becomes energy. When this energy is released, the object goes back to its original shape. Q. # 16. A., B., C.
Name the four examples of “Elastic Potential Energy” the energy is stored in the elastic bands or springs. A. B. C. D. Q. #17
Name four more examples of “Elastic Potential Energy”. That you can think of from next 4 pages! Q. #18 A, B, C, & D
On the back of your paper draw 3 examples of objects that have elastic potential energy that you find in the school!
When you lift an object, you do work on it. You use a force that is against the force of gravity. When you do this, you transfer energy to the object and give the object gravitational potential energy. Books on a shelf have gravitational potential energy. Q #1 - GPE
Objects that have more height, will have more gravitational potential energy. Objects that more more mass, will have more gravitational potential energy. Q # 2, 3 & 4 - GPE
A. B. Q # 5 - GPE
Explain when the children would have the greatest gravitational potential energy. Q # 6 - GPE
7. Name something with more GPE than the chicken. 8. Name something with less GPE than the chicken. Q # 7 & 8 - GPE
9. If two vases are sitting on the same shelf, how could one vase have more GPE. Q # 9 - GPE
10. What has the most GPE in the picture the rock or the person? 11. Why? Q # 10 & 11 - GPE
Which object has more gravitational potential energy? ___ a biker at the top of a hill or ___a biker at the bottom of a hill ___a leaf on a bottom tree branch or ___a leaf on a top tree branch ___a bowling ball on a table or ____ a ping-pong ball on a table ___a sumo-wrestler in a chair or ____ a 3-year old in a chair ___a skateboard at the top of a hill or ____ a car at the top of a hill ___a boulder on the front porch or ___the same boulder on the roof Q # GPE
Chemical energy is the energy of a compound that changes as its atoms are rearranged. Chemical energy is a type of potential energy. CPE #1
Common examples of chemical potential energy. CPE #1 CPE #2 A, B, C, & D A. B. C. D.
Chemical energy stored in food is generally changed into kinetic energy so you can make it through the day!! CPE #3
Chemical energy stored in batteries is changed into electrical energy to power all sorts of devices that we use everyday. CPE #4
Chemical energy stored in fossil fuels is generally used to power machines or cars, boats, trains, ships. CPE #5
We have talked about 4 types of energy: kinetic, elastic potential, gravitational potential, and chemical potential. Study each picture. What types of energy do you see? NAME all that apply!!
Gravitational potential Chemical potential Elastic potential Kinetic CPE #6 NAME all that apply!! Then Explain Each! EX.: Kinetic Because
Gravitational potential Elastic potential Chemical potential Kinetic CPE #7
Gravitational potential Chemical potential Elastic potential Kinetic CPE #8
Gravitational potential Chemical potential Elastic potential Kinetic CPE #9
Gravitational potential Chemical potential Elastic potential Kinetic CPE # 10
Gravitational potential Elastic potential Chemical potential Kinetic CPE # 11
1.Chemical energy - the energy stored in the apple. 2.Gravitational potential - energy because the apples are attached to the tree above the ground. 3.Kinetic energy - if an apple falls from the tree. 4.Elastic Potential Energy - branch snaps back when apple falls to ground. CPE # 6
1.Gravitational potential energy in the girl because she is above the water. 2.Elastic potential energy in the diving board when she jumps on it. 3.Kinetic energy when she jumps into the water. 4.Kinetic energy transferred from girl to water when the water splashes out of the pool. CPE # 7
1.Gravitational potential energy when the viking ship is at the highest height. 2.Kinetic potential energy when if falls from this height. 3.Sound energy when the people scream. CPE #8
1.Gravitational potential energy in the girl when she is at the highest point. 2.Elastic potential energy when she bounces on the black stretchy trampoline surface. 3.Kinetic energy when the girl bounces up and down. CPE # 9
1.Chemical energy stored in the gasoline of the motorcycle. 2.The chemical energy in the fuel changes into kinetic energy when the motorcycle moves 3.Sound energy from the motor. CPE # 10
1.Chemical energy in the food you eat. 2.Elastic potential energy in the yellow tendons when you bend your elbow back and forth. 3.Kinetic energy when you move your arm. CPE # 11