Answer :
Final answer:
The velocity of the sedan relative to the police cruiser is 25.7 km/h west.
Explanation:
To find the velocity of the sedan relative to the police cruiser, we need to subtract the velocity of the police cruiser from the velocity of the sedan.
Given:
- Sedan velocity: 74.2 km/h (west)
- Police cruiser velocity: 99.9 km/h (west)
To subtract the velocities, we need to consider their directions. Since both the sedan and the police cruiser are moving west, we can subtract their magnitudes:
Relative velocity = Sedan velocity - Police cruiser velocity
Relative velocity = 74.2 km/h - 99.9 km/h
Relative velocity = -25.7 km/h
The magnitude of the relative velocity is 25.7 km/h, and the direction is west.
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