Bursitis can affect many joints and can be caused by a numerous sporting activities, such as cycling, tennis, and long-distance running. Explain what bursitis is and what characteristics the mentioned sporting activities have in common? (Site 1

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .