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.

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.

The simplest, most familiar form of energy of all is in terms of mass. You don't normally think in terms of Einstein's E = mc2, but every physical object that's ever existed in this Universe is ...

In recent weeks, I've talked about building arrows that penetrate better. You've seen me mention both how having a heavier arrow and selecting the right broadhead can dramatically increase your ...