Use a flashlight
Yes, it is possible for an object to cast several shadows. One example, is that of a footballer on a floodlit pitch. If he is in the central region of the field, you will usually see four shadows: one from each of the corner floodlights.
Two light sources at different angles with respect to the object.
If the object was a regular shape (a cube for example) it would cast the same shadow from any angle. An irregular shape (such as a car) will cast different shadows dependent upon the source of the light.
No, it is not possible for a human to have two distinct shadows at the same time. Shadows are created when an object blocks light, so having two separate shadows would require two different light sources in opposite directions, which is not a typical scenario.
because light may be hitting it from many different areas or views.
Shadows are caused when an object blocks part of a beam of light that is falling on a surface. The surface areas receiving less light are darker (less illuminated by the light) and may assume the same general shape of the object causing the shadow.
They could be the same if the frames of both onjects were taken at different time intervals
drop a heavy object and a light object from the same height at the same time. time it with a stopwatch, or just watch them.
You can conclude many things, but you have to make some assumptions. The conclusion you could make from this limited amount of data is that the two objects are falling, since objects fall at the same rate.
by col0ring a same type of object
I believe the first experiment measure the length of shadows at two widely separated locations. They used an object of known lenght and took the measurement at the same time of day. The shadows were different lengths that indicated the sun was at a different angle.
You apply a force to an object. The object must move in the same way as the applied force