An airplane is flying at 635 km per hour at an altitude of 35,000 m. what is its velocity? a. 635 km/h b. 16 m/min c. 35 000 m/s d. this cannot be determined without further information about its direction.

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 .