Astronauts often undergo special training in which they are subjected to extremely high centripetal accelerations. one device has a radius of 15 m and can accelerate a person at 98 m/s2. what is the speed of the astronaut in this device?

The centripetal acceleration of an object is given by the relation,

where Ac = centripetal acceleration =

R = radius of rotation = 15 m

V = speed of astronaut

Hence,

solving this we get, V = 38.34 m/s

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.