I need help and I don't understand if you can help me but let it be before 6:00

balanced: a train moving at a constant speed, the moon orbiting the earth at a constant speed, a lamp sitting on a desk, an apple hanging on a tree

unbalanced: a skier coming down a mountain, a car accelerating from the start line, a soccer ball after it was kicked, a parachuter falling to ground

Explanation:

all the balanced ones are either moving at a constant speed or are skill

all the unbalanced ones were disturbed by some sort of force causing them to accelerate, go faster, blah blah blah

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !