The theory was formulated in the 1960s and 1970s as new information was obtained about the nature of the ocean floor, Earth's ancient magnetism, the distribution of volcanoes and earthquakes, the flow of heat from Earth's interior, and the worldwide distribution of plant and animal fossils.
Loose or worn out tie-rod ends can be the cause of death wobble. To test them, jack up one tire at a time grab the tire at the three oâclock and nine oâclock positions, then try to turn the tire back and forth by alternatively pushing and pulling on the tire. Any movement indicates warn out tie-rod ends.
Rope burns. Or, say too much friction in the bearings of your car will waste gas or cause things to get hot and melt! Because of friction some of the energy will be wasted in any aspect ,hence because of friction total energy is not converted in work. Due to friction, energy is required to ride the cycle etc.