52. Biophysical effects of Velocity Changes and Mechanical Forcesrename
yaboiemil's version from 2016-01-27 15:55
Section1. You experience 9.81m/s^2 gravitational acceleration normally.
2. Any multiple of this (e.g. 2g, 4g) is known as acceleration stress
3. Acceleration stress can be positive (towards earth core) or negative (away from earth's core)
4. Too much positive (>5g) results in unconciousness, as all blood moves to feet
5. Too much negative (>3g) results in too much pressure in the head, causing a brain haemorrhage.
6. The state of weightlessness can be achieved in a spaceship, when the centrifugal and centripetal forces are at equilibrium
7. The body is adapted to have normal gravitational acceleration, so when it is in this weightless state,
problems with neuromuscular coordination, orientation, eating, drinking and excreting can occur.
8. Muscular Strength also decreases
9. Motion sickness is a result of irregular changes in acceleration and deceleration. Nausea and vomiting are
symptoms that arise from the vegetative nervous system as a result.
10. A hit or sudden change in movement can cause concussion, contusion, internal/external injury and breaking of bones
11. Brain concussion can cause unconciousness, and, accompanied with contusion or haemorrage, cause a coma
12. Heart concussion can cause either over excitability OR Heart arrest
13. Repeated vibrations from machine (e.g. Jackhammer) can cause Raynaud's Phenomenon, where veins go into spasm
and cut off blood supply to say, one finger.