Question

Problem 38

Answer 1

Given information

Given a person going for a morning jog on the deck of a cruise ship is running toward the bow (front) of the ship at while the ship is moving ahead at .

To find: What is the velocity of the jogger relative to the water? Later, the jogger is moving toward the stern (rear) of the ship. What is the jogger's velocity relative to the water now?

Step-by-step explanation

Step 1.

Motion is relative. It means that the description of motion may be different for different observers.

To identify the velocity of the person relative to the water,

• identify the relative velocities, their magnitude, and direction
• use the appropriate vector operation to get the magnitude and direction

In the first part, the ship (S) moves forward relative to the water (W). At the same time, the person (P) is moving forward relative to the ship. From these, there are three relative velocities.

•   - velocity of the ship relative to the water
•   - velocity of the person relative to the ship
•   - velocity of the person relative to the water