You may not believe it, but speed can be negative. In the world of physics, kinetic energy is converted to thermal energy when an object falls or moves faster than the air can push back against it. This means that you are actually slowing down instead of speeding up. The same thing happens in a car engine: as heat increases, so does friction and less work gets done.
There are also cases where the speed of an object can be negative. This happens when you accelerate towards a physical barrier, and your velocity becomes faster than that of light as it moves closer to the surface. The total energy remains unchanged but is transferred from kinetic energy (i.e., motion) to potential energy (i.e., height). In conclusion: speed can be both positive and negative depending on what type of work is being done and what types of forces are involved in its production or transformation.
It’s important for any aspiring physicist to understand this concept. There are many applications within their daily lives which they may not have considered before. This article will outline two examples while explaining how physics works.