Crosswinds
Member
"A cross country runner runs at 3.2 ms^-1 for 5 minutes north, then runs at 4 ms^-1 for 10 minutes north. He then returns to the start at a steady pace, taking 20 minutes. Find:
b) his diplacement after 10 minutes.
e) his average speed for the whole journey."
According to the answers:
b) 3360 m north
e) 3.2 ms^-1
But i keep getting:
b) 2160 m north
e) 192 ms^-1 (lol)
I know these are really easy, but I'm obviously doing something stupid. Could someone please explain fully how to get the correct answers?
Thank you!![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
b) his diplacement after 10 minutes.
e) his average speed for the whole journey."
According to the answers:
b) 3360 m north
e) 3.2 ms^-1
But i keep getting:
b) 2160 m north
e) 192 ms^-1 (lol)
I know these are really easy, but I'm obviously doing something stupid. Could someone please explain fully how to get the correct answers?
Thank you!