Question

A horse began running due east and covered 25 km in 4.0 hr. What is the average velocity of the horse?

A) 0.16 km/hr due east
B) 6.25 km/hr due east
C) 16 km/hr due east
D) 100 km/hr due east

Answer 1

B) 6.25 km/hr due east

Answer 2

B)
`v = 6.25(km)/(hr)` due east

Step-by-step explanation:

Conceptual analysis

The average speed (v) is defined as the relationship between the displacement (d) that a body made and the total time (t) it took to perform it and is calculated by the following formula:

`v = (d)/(t)` Formula (1)

v: velocity in m/s

d: Displacement (m)

t: Time (s)

Known data

We know the following data

d = 25 km

t = 4.0 hr

Problem development

We replace data in formula (1):

`v =(25km)/(4hr)`

`v = 6.25(km)/(hr)`