Why does an object released from the hand , fall on the earth ?

The figure shows the speed as a function of time for an object in free fall near the surface of the earth. The object was dropped from rest in a long evacuated cylinder . If the same object were released in air, the magnitude of its acceleration would begin at the free-fall value, but it would decrease continuously is zero as the object continued to fall. For which one of the choices given does the solid line best represent the speed of the object as a function of time when it is dropped from rest in air ? Note: The dashed line shows the free-fall under vacuum graph for comparison.

The figure shows the speed as a function of time for an object in free fall near the surface of the earth. The object was dropped from rest in a long evacuated cylinder . What is the speed of the object 3.0 seconds after it is dropped ?

Why does an opaque body form shadow when light falls on it ?

The figure shows the speed as a function of time for an object in free fall near the surface of the earth. The object was dropped from rest in a long evacuated cylinder . What is the numerical value of the slope of the line ?

The figure shows the speed as a function of time for an object in free fall near the surface of the earth. The object was dropped from rest in a long evacuated cylinder . Which one of the following statements best explains why the graph goes through the origin ?

An object is released from a height twice the radius of the earth on the surface of earth. Find the speed with which it will collide with group by neglecting effect of air. (Take, R radius of earth and mass of earth as M)