University:
Delaware County Community College
Course:
PHY 230 | Modern Physics
Academic year:

2023
Views:

94

Pages:

2
Author:

meteorites

● What is the kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s? (Formula: ) 25 J ● Which object is on the tallest hill? Z ● A soccer ball is traveling at a velocity of 50 m/s. The kinetic energy of the ball is 500 J. What is the mass of the soccer ball? (Formula: ) 0.4 kg ● A sled is at rest at the top of a slope 2 m high. The sled has a mass of 45 kg. What is the sled’s potential energy? (Formula: PE = mgh) 882 J ● A car is moving at 12 m/s and has a mass of 600 kg. What is the kinetic energy of the car? (Formula: ) 43,200 J ● The amount of kinetic energy an object has depends on which feature of the object? its motion ● Ella has a mass of 56 kg, and Tyrone has a mass of 68 kg. Ella is standing at the top of a skateboard ramp that is 1.5 meters tall. Which conclusion is best supported by the given information? If Tyrone stands at the top of a 2 m high ramp, his potential energy will be greater than Ella’s. ● Which will most likely increase the kinetic energy in this system? releasing the string ● Which statement best describes the skier? The skier has potential and kinetic energy. ● Which statement best describes the energy in this system? The potential energy in the system is greatest at X.