Question

question 5. speed and velocity are terms used to describe an object’s motion. which two descriptions are paired with the correct term of motion? a. a bird flying off a branch at 3 m/s² is an example of velocity. b. an airplane traveling at 800 kilometers per hour is an example of speed. c. a boat moving north at 10 kilometers per hour is an example of velocity. d. a person running at 10 kilometers per hour is an example of distance. e. a car traveling southeast at 70 kilometers per hour is an example of speed.

Explanation:

Speed is a scalar quantity representing how fast an object is moving, with only magnitude. Velocity is a vector quantity with both magnitude and direction. Option B is speed as it has only magnitude (800 km/h). Option C is velocity as it has magnitude (10 km/h) and direction (north). Option A has acceleration ($m/s^{2}$), not velocity. Option D is speed, not distance. Option E is velocity as it has magnitude and direction, not just speed.

Answer:

B. An airplane traveling at 800 kilometers per hour is an example of speed.
C. A boat moving north at 10 kilometers per hour is an example of velocity.