Problema Solution
An expectant father paces the hospital hallway waiting for his unborn child to arrive. If the father walks 5 m east, then 7 m west, and finally 12 m east at a velocity of 1.2 mph. Determine how long it took the father to do this.
Answer provided by our tutors
let
t = the time of the walk
the total length of the walk of the water will be a sum of all the walks that is
d = 5 +7 + 12
d = 24 m
v = 1.2 mph = 1.2*0.44704 m/s = 0.536448 m/s is the velocity (since 1 mph = 0.44704 m/s)
v = the length of the walk / the time needed for the walk
v = d/t => t = d/v
t = 24/0.536448
t = 44.74 s approximately
It took him 44.74 s to do the walk.