A hammer and a feather will fall with the same constant acceleration if air resistance is considered negligible. This is a general characteristic of gravity not unique to Earth, as astronaut David R. Scott demonstrated on the Moon in 1971, where the acceleration due to gravity is only 1.67 m/s2.
Answer:
When air resistance is neglected, all objects fall toward the ground with all the same acceleration called free fall.It is approximately equal to 9.8m/s. The force that causes object to fall toward the center of the Earth is called gravity. It is expressed through the equation 9.8m/s²
