- #1
frank1
- 25
- 0
=>Two skaters, one of 65kg e another of 40kg, are in a ice stadium and are holding the extremities of a rope of 10meters of negligible mass. They pull each other until they stay close to each other. What distance the 40kg skater "walked"?
My attempt:
Well, there aren´t external forces acting here, so the center of mass doesn't move... that's the theory but I'm failing when I try to aply this concept.
If I try to find the center of mass I find this number for it: (x1*m1+x2*m2)/(m1+m2)=>(0*65+10*40)/(65+40) =>Center of Mass=3,8m
And now... what is the next step?
Thanks in advance,
My attempt:
Well, there aren´t external forces acting here, so the center of mass doesn't move... that's the theory but I'm failing when I try to aply this concept.
If I try to find the center of mass I find this number for it: (x1*m1+x2*m2)/(m1+m2)=>(0*65+10*40)/(65+40) =>Center of Mass=3,8m
And now... what is the next step?
Thanks in advance,
Last edited: