Its momentum is 7 km/hr. Its acceleration is 7 km/hr. Its displacement is 7 km/hr. Its average speed is 7 km/hr.
A sailboat travels 35 km in 5 hr. Which of the following describes the motion of the sailboat?

Options:
- Its momentum is 7 km/hr.
- Its acceleration is 7 km/hr.
- Its displacement is 7 km/hr.
- Its average speed is 7 km/hr.

Its average speed is 7 km/hr.