Definition of the Law of Conservation of Energy: states that the total energy of an isolated system remains constant — it is said to be conserved over time.
Mathematical Representation for the Law of Conservation of Energy
abbreviated version: Ei=Ef
extended version:
Different units of Energy
SI units: Important to know that energy is measured in joules. one joule = 1 watt with electricity' 1 second
American Units: The imperial/U.S. units for both energy and work include the foot-pound force (1.3558 J)
Video:
Testing! Conservation of Energy
Problem Online:
They tested the law of conservation of energy by proving that energy cannot be created or destroyed. The ball is at a constant speed and that's why it does not hit the guy, because it will not go further from it's starting point. It will only go from the maximum potential energy to the highest point of swing.
The diagram below shows a 10,000 kg bus traveling on a straight road which rises and falls. The horizontal dimension has been foreshortened. The speed of the bus at point A is 26.82 m/s (60 mph). The engine has been disengaged and the bus is coasting. Friction and air resistance are assumed negligible. The numbers on the left show the altitude above sea levels in meters. The letters A-F correspond to points on the road at these altitudes
b.An extortionist has planted a bomb on the bus. If the speed of the bus falls below 22.35 m/s ( 50 mph) the bomb will explode. Will the speed of the bus fall below this value and explode? If you feel the bus will explode, identify the interval in which this occurs.
c.Derive an equation to determine the speed of the bus at any altitude.
My problem:
In the second image the rider is going through the loop. The potential energy comes back from decreasing to increasing. The kinetic energy
