How much force is needed to produce an acceleration of 20ms^2 in a body of mass 500gm

Which object is most likely represented by a dot?

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

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 .