You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser.
-
V
okey. I thought that you used it in a
-
V
In the task it says "How much work does the child have to do on the sleigh". Shouldn't you then use 8kg as the mass?
-
V
Seems it went a bit to fast when I did it. Then I get the same as you two
-
V
In your answer c. shouldn't also rcos(tetta) be (rcos(tetta))^2?
I get the same as you in d, only that then it's: v=sqrt(g*r^2)