Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Spring constant help needed?
a 0.60-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.12 to 0.23 m (relative to its unstrained length), the speed of the sphere decreases from 5.70 to 4.80 m/s. What is the spring constant of the spring?
1 Answer
- kuiperbelt2003Lv 71 decade agoFavorite Answer
use conservation of energy, knowing that the total energy at each point is the same
call x1, v1 the values at x=0.12m and x2, v2 the values at x=0.23m, energy conservation tells us
1/2k(x1)^2+1/2m(v1)^2=
1/2 k(x2^2) + 1/2 m(v)^2
dividing through by 1/2 and substituting values, we get
k(0.12)^2+(0.6)(5.7)^2=
k(0.23)^2+(0.6)(4.8)^2
collecting terms:
k[(0.23)^2-(0.12)^2]=
0.6[(5.7)^2-(4.8)^2]
and now just solve for k
