[Nicholas Rehm] works during the day at the Applied Physics Laboratory at Johns Hopkins, Maryland, so has considerable experience with a variety of UAV applications. The question arose about how the ...

Reaction wheels are useful things, typically used by satellites to keep themselves oriented the right way up in space. Turning the reaction wheel creates an equal and opposite torque in the spacecraft ...

In this video I show you how an inverted pendulum works. The physics behind the gravity defying pendulums requires complex equations, but has a simple explanation. Tragic story of Snenhlanhla: South ...