mechanics

Which one is right

• the shortest length of a path taken by an object from one point to another

• the location of an object within a physical frame of reference

O the study of motion

• the total ground covered by an object during its motion

The first and fourth definitions are correct. The second one could be rephrased as "the position of an object within a physical frame of reference." The third definition is incorrect. Mechanics is the branch of physics concerned with motion and the behavior of physical objects.