A person sets off jogging along a canal path at 1e km/h at the same time as a boat sets off at 10km/h. a. how far will each one travel in half an hour?
b. what's the relative speed?
c. to the jogger how would the boat appear to be moving as they travel along the canal?

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?