A girl standing upright exerts a pressure of 13600 on the floor given that the total area of contact of her shoes and the floor 0.00368. Determine the mass of the girl

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 .