Monthly Archives: December 2013

What should be the spring constant k of a spring designed to bring a 1240 kg car to rest from a speed of 92 km?

  1. What should be the spring constant k of a spring designed to bring a 1240 kg car to rest from a speed of 92 km/h so that the occupants undergo a maximum acceleration of 5.0 g?

    Please show work.
    Yes, this is for homework.

    Answer by rex
    distance to stop in = v^2 / 2 a == 25.55^2 / 2 . 5 . 9.8 = 6.66 m

    1/2 . m . v^2 = 1/2 . k . x^2

    1240 . 25.55^2 = k . 25.55^2 / 98

    k = 31689 N / m

  2. What can be said about K-selected species relative to the carrying capacity of their habitat?

    a. They sometimes exceed the carrying capacity.

    b. They always exceed the carrying capacity.

    c. They never approach the carrying capacity.

    d. They never exceed the carrying capacity.

    Answer by Niotulove
    ‘A’ is the best answer. Population size fairly stable and usually close to carrying capacity (K).

  3. What should be the spring constant k of a spring designed to bring a 1320 kg car to rest from a speed of 93 km/h so that the occupants undergo a maximum acceleration of 5.0 g?

    Answer by Steve
    x = V²/2a = 25.83²/(2*5*9.8) = 6.81 m

    ½mV² = ½k*x² ? k = mV²/x²

    k = 18996 N/m

I Am Moving There when It’s Completed

Happy Girl Sitting On River Bank Stock Image - Image: 16102201I had told my friends and family that I was looking for a new place to live. I had not been extremely happy from the beginning of moving to where I live now, but it was an ideal location for me. When my company relocated to District 19, it took away the only reason for me living here. A friend sent me an email that told me to click here for new launch details, and I was very happy to see that the launch details were about Riverbank at Fernvale. I had seen the construction going on there, but I had not looked at any information on it yet because it was still in its early stages of development.

When I actually started to dig around in the site that he sent me though, I knew that I wanted to live there. It would not be available for a while yet, which works perfectly for me since I am tied into a lease here for a while yet. Just knowing that I will be moving as soon as it is done is all I need to keep me going though. It is going to be real close to where I work now, and my commute time is going to be even shorter than what it was before the company relocated.

Even better that though are all of the things that I will be able to do once I am there. My friends tease me about being a social butterfly, and I have to laugh with them because it is true. I like to stay busy, and I knew I wouldn’t have a problem with that with everything that is offered at Riverbank at Fernvale. I just have to bide my time until the work is completed there, then I can move and start enjoying myself again.