ENERGY PE, KE, WORK & POWER

USE THE ENERGY POWERPOINT ON GOOGLE CLASSROOM FOR HELP. Match the following terms with their definition or description. GPE gravitational potential energy EPE elastic potential energy CPE chemical potential energy PE energy of position KE energy of motion MECHANICAL ENERGY motion + position Law of Conservation of Energy energy cannot be created or destroyed Energy ability to do work work F x D Joule measures energy Energy due to an object's motion and position-- KE PE ME Formula for calculating kinetic energy-- KE = (.5)(m)(v2) KE = (g)(h)(m) G = (KE)(m)(v2) Formula for calculating potential energy is-- PE = g PE = (m)(g)(h) PE = KE A cart at the top of a 30 m hill has a mass of 40 kg. What is the cart’s gravitational potential energy? 12000 J 7.5 J 1225 J What is the mass of a baseball that has a kinetic energy of 105 J and is traveling at 10 m 2.1 g 10.5 g 1.05 g PE KE CARD SORT POTENTIAL ENERGY position gravity GPE Elastic Potential Energy Chemical Potential Energy height 9.8 m meters KINETIC ENERGY motion velocity 1 or .5 (m The left side of the table are symbols that represent the equations in the power point over PE and KE. The right side of the table are the units. Complete the table SYMBOL UNIT W J F N D m P W T s M kg V m Determine the areas of kinetic energy or potential energy Write KE for kinetic energy or PE for potential energy PE PE KE KE PE Amount of work done in a certain amount of time is-- power work energy What is energy? the ability to have power the ability to use energy the ability to do work What does the Law of Conservation of Energy state? Energy cannot be created, but can be destroyed Energy cannot be created nor destroyed, but is transformed into another form of energy. Energy can be destroyed and created. Amount of work done in a certain amount of time--- Power KE PE What is the kinetic energy of a jogger with a mass of 65.0 kg traveling at a speed of 2.5 m 81.25 J 203.13 J 406.25 J Find the gravitational potential energy of a rock that has a mass of 13.0 kg and is 4.8 m above the ground. 611.52 J 52 J 127.4 J Determine which of the following examples are KE or PE. KE PE A car traveling 45 km A rock is on a ledge 5 m high A ball is thrown into the air and is still moving A car resting at the top of a hill A ball rolling on the ground A skier at the top of a mountain A baseball thrown by a pitcher A spring in a pinball machine before it is released An insect flying A golf ball sitting on a tee before it is struck A river flowing at a certain speed A set of double "A" batteries in a remote control car Where is potential and kinetic energy found in the diagram below? Place a box around the ball that has the greatest PE.Place a star around the ball that has the greatest KE. Can you identify examples of chemical potential energy and elastic potential energy? Determine which of the following examples are CPE or ECE. CHEMICAL POTENTIAL ENERGY ELASTIC POTENTIAL ENERGY ICE CREAM RUBBER BAND GASOLINE SLING SHOT SUNLIGHT ARCHER'S BOW BATTERIES TRAMPOLINE WOOD BUNGEE CORD Amy uses 20 N of force to push a lawn mower 10 meters. How much work does she do? (W=F x D) 30 J 10 J 200 J How much power is used if a force of 35 newtons is used to push a box a distance of 10 meters in 5 seconds?Find work first. (W=F x D)Then find power. (P = W 70 W 70 J 350 J Roller CoastersDoes energy get transferred or transformed? As you move up to the first hill on a roller coaster the distance between the coaster and the Earth increases, resulting in an increase of gravitational potential energy.At the top of the first hill, you have the greatest gravitational potential energy.As you begin your trip down the hill, you increase your speed resulting in a transformation from gravitational potential energy to kinetic energy.As it starts to move up the next hill or loop, KE is transformed back into GPE.