Actually, you should join us. Today, we're learning about kinetic and potential energy. What time is it? - [All] It's science time. - Welcome back to another episode of DIY Science Time.

Now, with that picture in our heads — that there’s some energy inherent to the rest mass of a particle and that gravitational potential energy can be converted into kinetic energy (and vice ...

Even if we were to convert just a single kilogram (1 kg) of mass into energy, the fact that c² [which is (299,792,458 m/s)²] necessarily means that we'd get the equivalent of 21.5 megatons of ...

Essentially, all particles have energy because of both their motion (the kinetic energy is technically part of this) and their mass. But this means that even a particle at rest still has energy.

Kinetic energy (K): This is the energy an object has when it’s moving. The kinetic energy depends on both the mass of the object and its velocity.

So, if the box had a mass of 20 kilograms, and at some point while you were dragging it, it reached a velocity of 4 meters per second, we'd say that its kinetic energy at that moment was 160 Joules.