What are (1) free fall, (ii) acceleration
due to gravity (iii) escape velocity (iv)
centripetal force
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Explanation:
FREE FALL....
downward movement under the force of gravity only
ACCELERATION....The gravity of Earth, denoted by g, is the net acceleration that is imparted to objects due to the combined effect of gravitation and the centrifugal force. In SI units this acceleration is measured in metres per second squared or equivalently in newtons per kilogram.
Escape velocity.....the lowest velocity which a body must have in order to escape the gravitational attraction of a particular planet or other object.
Centripetal force....the force that is necessary to keep an object moving in a curved path and that is directed inward toward the center of rotation," while centrifugal force is defined as "the apparent force that is felt by an object moving in a curved path that acts outwardly away from the center of rotation," according to Merriam Webster Dictionary.