A moon orbits a planet in the plane, as shown in Figure 3.58. You want to calculate the force on the moon by the planet at each location labeled by a letter . At each of these locations, what are: (a)...

A moon orbits a planet in the plane, as shown in Figure 3.58. You want to calculate the force on the moon by the planet

at each location labeled by a letter . At each of these locations, what are: (a) the unit vector , and (b) the unit

vector in the direction of the force?