The ball thrown up from the balcony from a height of h1 = 3m, rose to a height of h2 = 4m

The ball thrown up from the balcony from a height of h1 = 3m, rose to a height of h2 = 4m relative to the balcony and fell to the ground. Determine the ball movement module.

For the ball, the movement will be equal to the sum of its successive movements; we will take the balcony as the starting point of reference.
S = S1 + S2, where S1 is the rise of 4 m, S2 is the height of the fall to the ground (S2 = -4 + (-3) = -7 m).
S = S1 + S2 = 4 – 7 = -3 m.
Answer: The ball movement module is 3 m.