University:
High School
Course:
High School Physics
Academic year:

2024
Views:

37

Pages:

2
Author:

StellarSymphony

Name: __________________________________________________________ Date: ________________________ Period: _________ Calculating Potential Energy & Kinetic Energy Directions: Read the following situations and determine whether the objects in the following problems have kinetic or potential energy. Then, for each problem, identify the givens, unknown, the formula used, substitution of the givens, and answer with the correct unit. Remember, kinetic energy is the energy due to an object’s _______________________ and potential energy is stored energy due to an object’s _____________________________________________. Formulas Needed: GPE = KE = 1. You kick a soccer ball along the ground with a mass of 2.1 kg. The ball leaves your foot with a speed of 30m/s. The ball has _______________________________________ energy. Calculate it. 2. A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby weighs 12 N. The carriage has ___________________________________ energy. Calculate it. 3. A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has __________________________ energy. Calculate it. 4. A cinder block is sitting on a platform 20 m high. It has a mass of 8 kg. The block has ____________________________________________ energy. Calculate it. 5. There is a bell at the top of a tower that is 45 m high. The bell weighs 190 N. The bell has ____________________________________ energy. Calculate it. 6. A roller coaster is at the top of a 72 m hill and weighs 966 N. The coaster (at this moment) has ____________________________________ energy. Calculate it. 7. An object has a speed of 4 m/s and ____________________ energy of 96 J. What is its mass? 8. An object resting on a platform has ____________________ energy of 41772.5 J and has a mass of 1550 kg. How high is it above ground? 9. An object is moving with an unknown velocity and has ________________ energy of 1125J has a mass of 250kg. What is its velocity? This graph shows a ball rolling from A to G. The ball starts at point A and rolls to point G. 10. At what letter does the ball have the greatest kinetic energy? __________ 11. Which letter shows the ball when it has the maximum potential energy? __________ 12. Which letter shows the ball when it has the least potential energy? ___________ 13. Why is point G slightly lower than point A? In other words, why couldn’t the ball go back to the same height at which it started?