Final Jeopardy On the Move Energy Potpourri Things that are “stored” Precious Joules I Math Don’t Break the Law JEOPARDY 100 100 100 100 100 100 200 200 200 200 200 200 300 300 300 300 300 300 400 400 400 400 400 400 500 500 500 500 500 500
Energy related to the motion of an object. What is kinetic energy?
The equation used to calculate kinetic energy. What is KE = ½ mv2?
Kinetic energy depends on these two variables. What are mass and velocity?
Kelly is sledding down a hill. The energy the sled has as it slides is electrical, mechanical, chemical, or nuclear? What is mechanical (PE + KE)?
The energy of an object due to the random motion of its atoms and molecules. (Hint: pot of water on stove) What is thermal energy?
Sound energy is a form of _______. What is kinetic energy?
The energy stored in springs and rubber bands. What is elastic potential energy?
The transfer of energy. What is work?
The energy resulting from the flow of charged particles, such as electrons or ions What is electrical energy?
Gamma rays, X-rays, UV rays, visible light, infrared, and radio waves are examples of this type of energy. What is electromagnetic energy?
Assume that Mrs. Hochand Kobe the turtle are skiing down the same slope at Mad River Mountain. Which skiier has a greater gravitational potential energy? Who is Mrs. Hoch?
The energy stored in an object because of its position or shape. What is potential energy?
Food is essential to the survival of all organisms because of its stored ________ potential energy. What is chemical potential?
The three variables that potential energy depends on. What are mass, gravity, and height?
PE = mgh The equation for potential energy.
The point at which a ball thrown up in the air has the greatest amount of potential energy. What is at its highest point above the ground?
Fossil fuels, like oil and gas, store this type of energy. What is chemical potential energy?
Kobe has a mass of 1.5 kg and is sitting on a desk 10 meters above the ground. What is Kobe’s gravitational potential energy? G=9.8 m/s2 PE = mgh = (1.5 kg)(9.8 m/s2)(10 m) = 147 Joules
Describe how energy is transformed when Terrell Pryor prepares to throw a football to Dane Sanzenbacher. What type of energy does the football have before it leaves Pryor’s grasp? What type of energy does the football have as it hits the ground in an incomplete pass? What is potential before it leaves Pryor’s grasp and kinetic as it falls to the ground?
A skydiver with a mass of 60 kg jumps out of an airplane at a height of 5,000 meters. The acceleration due to gravity is 9.8 m/s2. What is the gravitational potential energy of the skydiver? Daily Double What is PE = (60 kg)(9.8 m/s2)(5,000 m)? = 2,940,000 Joules or 2,940 kJ
A 4-kg object moving at a speed of 8 m/s has a kinetic energy of What is KE = ½ mv2? = ½ (4 kg)(8 m/s) 2 = 128 J
What is the potential energy of a giant snow ball that weighs 1 kg on a mountain that is 500 meters high? G=9.8 m/s2 What is PE = mgh = (1 kg)(9.8 m/s2)(500 m) = 4,900 J
Kobe the Yeti goes skiing on Mad River Mountain. He zooms past Mr. Pauffat a velocity of 25 m/s. Kobe has a mass of 2 kg. How much kinetic energy does Kobe have? What is KE = ½ mv2? = ½ (2 kg)(25 m/s)2 = 625 J
Mrs. Hoch is pushing her 2 year old nephew Vinnie on a swing. Vinnie weighs about 15 kg. When Vinnie is at his highest point on the swing, he is 2 meters above the ground. What is Vinnie’s gravitational potential energy at his highest point? G= 9.8m/s2 What is PE= mgh? PE = (15 kg)(9.8m/s2)(2 m) = 294 Joules
Wile E. Coyote compresses a spring creating elastic potential energy. As the spring expands, the energy is transformed into kinetic energy. If Wile E. Coyote weighs 20 kg and is moving at a speed of 67.5 m/s, what will Wile E. Coyote’s maximum kinetic energy be? KE = ½ mv2 = 45,562.5 J
The type of energy transformation takes place when wood is burned What is chemical to thermal?
The definition of the law of conservation of energy. What is energy cannot be created or destroyed?
Explain how energy is transferred in a wind-up toy. When the dial is turned, the wind-up toy gains elastic potential energy. When the dial is released, the wind-up toy converts elastic potential as the spring expands, into kinetic energy.
Kobe the Yeti mixes baking soda with vinegar in an Erlenmeyer flask. What type of energy do both substances contain prior to mixing them together? Baking soda and vinegar contain chemical potential energy?
A toaster changes electrical energy into thermal energy. This is a(n)a. energy conservationb. fossil fuelc. energy transformation What is c, an energy transformation.
Pick one of the following daily tasks, and then describe at least three forms of energy and three energy transfers in that task: Waking up and shutting off your alarm clock Brushing your teeth Getting to school in the morning Final Jeopardy