A moon orbits a planet in the xy plane as shown in the figur

A moon orbits a planet in the xy plane, as shown in the figure, you want to calculate the force on the moon by the planet at each location labeled by a letter (A, B, C, D). at each of these location What are (a)n the unit vector , and (b) the unit vector in the direction of the force?

Solution

question ask only about the unit vector. (that is only direction vector with unit magnitude )

A) r = i

F = -i

B) r = j

F = -j

c) r = -i
F = i

d) r = -j

F = j