Suppose an object in freefall is dropped from a building it’s starting velocity is 0m/s. ignoring the facts of air resistance what is the speed (in m/s) of the object after falling three seconds?

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 .