In a park, Kwame is standing on a hilltop while Rajni is at the bottom of the hill. A steady wind is blowing across from Kwame's right to left. Both are holding balloons on strings. If they both let go of their balloons at the same moment, what happens to the balloons, and why does Rajni see Kwame's balloon move differently than her own? Provide a very brief response.
When Kwame and Rajni let go of their balloons, the wind blowing from Kwame's right to left causes both balloons to move to the left from their respective positions. However, due to gravity, the balloons will also begin to rise. Since Kwame is on top of the hill and Rajni is at the bottom, Kwame's balloon starts at a higher elevation. Thus, as Rajni looks up towards Kwame's balloon, she observes it moving diagonally up and to the left, appearing to take a slanted trajectory, while her own balloon, starting from a lower point, appears to ascend more vertically while also moving to the left. The difference in the starting elevation of the two balloons and Rajni's angle of view from the bottom of the hill accounts for the variation in the perceived movement of the two balloons.