Kinetic and Potential Energy Worksheet KEY g=9.8, Study notes of Piano

Download Kinetic and Potential Energy Worksheet KEY g=9.8 and more Study notes Piano in PDF only on Docsity! Kinetic and Potential Energy Worksheet Name ___________________________ Classify the following as a type of potential energy or kinetic energy (use the letters K or P) 1. A bicyclist pedaling up a hill _____ 2. An archer with his bow drawn _____ 3. A volleyball player spiking a ball _____ 4. A baseball thrown to second base _____ 5. The chemical bonds in sugar _____ 6. The wind blowing through your hair _____ 7. Walking down the street _____ 8. Sitting in the top of a tree _____ 9. A bowling ball rolling down the alley _____ 10. A bowling ball sitting on the rack _____ What examples can you find in your home that are examples of kinetic and potential energy? (name two for each type of energy) 11. Kinetic: __________________________________________________________________________ 12. Kinetic: __________________________________________________________________________ 13. Potential: _________________________________________________________________________ 14. Potential: _________________________________________________________________________ Kinetic Energy – what does it depend on? 6 The an object moves, the it has. 6 The greater the of a moving object, the it has. 6 Kinetic energy depends on both . Solve the following word problems using the kinetic and potential energy formulas (Be sure to show your work!) Formulas: KE = 0.5 ·m· v2 OR PE = m·g·h v = velocity or speed m = mass in kg g = 10 m/s/s h = height in meters 15. You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has __________________ energy. Calculate it. 16. A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby has a mass of 1.5 kg. The carriage has _________________ energy. Calculate it. 17. A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has _____________ energy. Calculate it. K K P K K P K K P P KEY radio, lamp, dishwasher bicycle, T.V. piano food, batteries, magnets gasoline, propane, running shoes faster greater the KE mass greater the KE mass and velocity 945 J 308.7 J 8.96 x 10^5 J 18. A cinder block is sitting on a platform 20 m high. It weighs 7.9 kg. The block has _______________ energy. Calculate it. 19. A roller coaster is at the top of a 72 m hill and weighs 134 kg. The coaster (at this moment) has ____________ energy. Calculate it. 20. There is a bell at the top of a tower that is 45 m high. The bell weighs 19 kg. The bell has ________________ energy. Calculate it. 21. Determine the kinetic energy of a 1000-kg roller coaster car that is moving with a speed of 20.0 m/s. 22. If the roller coaster car in the above problem were moving with twice the speed, then what would be its new kinetic energy? 23. 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 3.0 kg and the height of the seat top is 0.45 meters, then what is the potential energy of the loaded cart at the height of the seat-top? 24. A 75-kg refrigerator is located on the 70th floor of a skyscraper (300 meters above the ground) What is the potential energy of the refrigerator? 25. The potential energy of a 40-kg cannon ball is 14000 J. How high was the cannon ball to have this much potential energy? 6 IF most of the energy we use on earth comes from the sun – how does that energy (light and thermal) end up 6 As energy in our food 6 As energy of wind or moving water 6 As energy that powers our lights 6 As energy when we move around 1548.4 J 9.4550 x 10^4 J 8 379 J 200 000 J 800 000 J 13.23 J 2.205 x 10^5 J 35.71 m chemical mechanical electrical mechanical