As a woman carries her suitcase up a flight of stairs, she does work against gravity. If the mass of her suitcase is 10 kg and the flight of stairs is 12 m tall,
how much work does she perform by carrying her suitcase? (Recall that g =
9.8 m/s?)

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 .