Zach is making a round trip going from home to work. To get to her work she goes 30 m/s and then to get back home she goes 50 m/s. What is the velocityof Zach for the entire round trip? a. 0 m/s b.-20 m/s c. 80 m/s

Question

Physics

Krista Vang

13 June, 15:17

Zach is making a round trip going from home to work. To get to her work she goes 30 m/s and then to get back home she goes 50 m/s. What is the velocityof Zach for the entire round trip? a. 0 m/s b.-20 m/s c. 80 m/s

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Answers (1)

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Janet Fletcher · Answer 1

Vamos supor que o trajeto tem 300 metros:

Na ida ele faz o trajeto em:

t=300/50=30/5=6 s

Na volta:

t=300/30 = 10s

Somamos o tempo total:

t=10+6=16s

E a distancia total:

300.2 = 600

e fazemos:

v=600/16 = 37,5 m/s