What causes objects to move or stay still?

claim:

evidence:

The process in which the nucleus of an atom splits into two lighter atoms, releasing a large amount of energy is nuclear

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 .

When you hold a rectangular object, how does the area of the side that is resting on your hand affect the pressure and the force that the object exerts?