Question

1. a jet boat cruised north from one end of the lake to other at a constant rate of 15 mi/hr.

this is an example of:
speed
velocity
acceleration

Explanation:

Speed is a scalar quantity (only magnitude). Velocity is a vector quantity (magnitude and direction). Here, the boat has a magnitude of \(15\) mi/hr and a direction (North). Acceleration is the rate of change of velocity. Since the problem gives a constant rate with a direction, it's about velocity.

Answer:

velocity