An elevator has a mass of 3000 kg. If the upward tension in the supporting cable is 42000 N, how far does it rise in 2 seconds,
assuming it begins at rest?

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 .