Asked by bety

a girl walks 1km north in 15min.then walks 200m south west in 60sec.what is her average velocity?
Answered by Henry
Displacement = 1000i +1000i + 200[225o] = 1000i + 200*Cos225 + 200*sin225 =
1000i - 141.4 - 141.4i = -141.4 + 858.6i
= 870m[99.4o]CCW = 80.6o N. of W.

V = D/t = 870m[99.4o]/960s = 0.91 m/s.


Answered by grade 11
assignmet
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