1.8 A jogger takes the following route to the entrance of their local park: north 45 m, west 60 m, south 75 m, and finally west 50 m. It takes them 7 minutes 26 seconds to reach the park entrance. (b) What is the average speed of the jogger?

Answer 1

45m[90o] + 60m[180o] + 75m[270o] + 50m[0o].

X = -60 + 50 = -10 m.
Y = 45 -75 = -30 m.

d^2 = (-10)^2 + (-30)^2 = 1000
d = 31.62 m.

Speed=d/t = 31.62m/7.433min.=4.25 m/min