Michael L. answered • 02/04/16

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Intuitively explains the concepts in Math and Science

*start here * turn here

_________________________________V = 2.0 mls (Phillipe) ------->

----------------------------------------------Vo = 1.5 m/s (sidewalk)------->

*********************************U = 2.0 m/s (Renee) ------->

For the first leg

t1(Renee) = 20.0m/2.0m/s = 10 seconds

V1(Phillipe) = 2.0m/s + 1.5 m/s =3.5m/s

t1(Phillipe) = 20.0m/3.5m/s = 5.71 seconds

__________________________________ V = 2.0 m/s (Phillipe) <--------

------------------------------------------------ Vo= 1.5 m/s (sidewalk) ------->

***********************************U = 2.0 m/s (Renee) <--------

For return trip, the time Renee's time is the same as before

t2(Renee) = 10 second

V2(Phillipe) = 2.0m/s - 1.5 m/s = 0.5 m/s

t2 (Phillipe) = 20.0 m/0.5 m/s = 40 seconds

Renee took = 10sec + 10sec = 20 seconds

Phillipe took = 5.71 sec + 40 sec = 45.71 seconds

(a)

**Renee wins the race**(b) Difference in time taken between Phillipe and Renee is = 45.71 - 20 =

**25.71 seconds**