A person runs at a speed of 5 m / s relative to the deck of the motor ship in the direction opposite to the direction
| July 22, 2021 | education
A person runs at a speed of 5 m / s relative to the deck of the motor ship in the direction opposite to the direction of movement of the motor ship. The speed of the ship relative to the pier is 54 km / h. Determine the speed of the person relative to the pier.
Since the speed vectors of the ship and the person under consideration are directed in opposite directions, the speed of a running person relative to the pier is determined by the formula: Vp = Vt – Vch.
Values of variables: Vt – speed of the ship (Vt = 54 km / h = 15 m / s); Vh – the speed of a running person (Vh = 5 m / s).
Calculation: Vp = Vt – Vch = 15 – 5 = 10 m / s.
Answer: 2. The speed of a running person relative to the pier is 10 m / s.
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