Suppose the velocity of an object moving along a line is positive. are position, displacement, and distance traveled equal? explain.

Position of object is defined as the instantaneous location of object while it is moving along the straight line

So if the object is moving along the line then the position is continuously changing along its path or line

Now in order to find the displacement we can use the definition that change in the position of object along the straight line is known as displacement

So we can say

Now distance is defined as the total path length while moving and here it is moving along the straight line so the distance here is same as the displacement of the object

so here distance and displacement are equal while position is not equal

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

hypothesising or postulating