Well, it seems as though there would be no forces, because it's "at rest", but wouldn't gravity still be acting upon it?
Answer:

Explanation:
The kinematic parameters from the moment the two cyclists begin to accelerate until they meet are:
Initial parameters:
: Initial speed of cyclist A
: Initial speed of cyclist B
Final parameters:
: Final speed of cyclist B
distance of cyclist A = distance of cyclist B

time of cyclist A = time of cyclist B
Cyclist B Kinematics







Cyclist A Kinematics









Answer:
Explanation:
We know that the volume V for a sphere of radius r is

If we got an uncertainty
the formula for the uncertainty of V is:

We can calculate this uncertainty, first we obtain the derivative:


And using it in the formula:



The relative uncertainty is:



Using the values for the problem:

This is, a percent uncertainty of 4.77 %
That would be position Y, as the northern hemisphere is tilted away from the sun.