Perpetual Motion Engines
This is the best video I have come across so far that is used to introduce the idea of perpetual motion engines and why it violates the principle of conservation of energy.
This is the best video I have come across so far that is used to introduce the idea of perpetual motion engines and why it violates the principle of conservation of energy.
This GeoGebra app allows users to change the magnitude and direction of the force acting on an object, as well as the initial velocity. The change in kinetic energy is calculated...
Answer to question: Work done by external forces (excluding gravitational force) is negative. Since [latex]E_k=\dfrac{GMm}{2r}[/latex] for satellites in orbit (where G is the...