Answer :
First you need to know that any object having mass is subjected to force of gravity.
Second, for two moving objects that are touching, there will exist force of friction. This force will exist between the two objects as well as between the objects and the surface they are moving on (unless this surface is perfectly smooth and friction-less).
The force of friction is a force that opposes the motion of the body.
Second, for two moving objects that are touching, there will exist force of friction. This force will exist between the two objects as well as between the objects and the surface they are moving on (unless this surface is perfectly smooth and friction-less).
The force of friction is a force that opposes the motion of the body.