3. Rotational hypergravity

In addition to microgravity studies, testing living beings under hypergravity conditions can help us understand the effects of gravity on them. Gravity above 1  g is considered to be hypergravity. To increase gravity, you would need to travel to a more massive planet such as Jupiter or Saturn. Hypergravity can also be simulated on Earth using centrifuges, which create other forms of linear acceleration. When different forms of linear acceleration (including gravity) act on a body, that body is really being subjected to their resultant. That resultant plays the same role as gravity, its direction being taken as the physiological vertical (figure 24 ). Under rotation, the inertial force is centrifugal and proportional to the radius...