A ship is travelling due east at 30 km/hr and a boy runs across the deckin a south west direction at 10 km/hr. Find the velocity

3 answers
Question:

A ship is travelling due east at 30 km/hr and a boy runs across the deck in a south west direction at 10 km/hr. Find the velocity of the boy
relative to sea.

Answers

Vr = 20 [km/h]

Explanation:

In order to solve this problem, we have to add the relative velocities. We must remember that velocity is a vector, therefore it has magnitude and direction. We will take the sea as the reference measurement level.

Let's take the direction of the ship as positive. Therefore the boy moves in the opposite direction (Negative) to the reference level (the sea).

[tex]V_{r}=30-10\\V_{r}=20 [km/h][/tex]

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

answer: i don't know the answer good luck

explanation:

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