1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

2 force practice problems

  1. Nov 18, 2009 #1
    an elevator weighing 2x10^5n supported by a cable what is the tension on the cable when accelerating up is 3m/s2 g=9.8 obviously

    and

    an ice skater moves at 10 m/s and coasts to a halt in 100 meters on smooth ice what is the coefficient of friction on skates/ice

    i have tried many different ways and am not coming up with the answer i was given any help is greatly appreciated.
     
  2. jcsd
  3. Nov 18, 2009 #2
    It might be worthwhile to post some of the "many different ways" you've attempted, as per the template which you deleted when you posted.
     
  4. Nov 19, 2009 #3
    Question A-elevator)

    Forces pointing downwards: Weight of lift
    Forces pointing upwards: Tension force, ma(where m and a are mass and acceleration of lift respectivelly)

    Balance the two equations to find the missing link: The tension force.

    QuestionB-ice skater)

    Do exactly the same:

    From the data given (v and s) you can find the acceletarion(or rather deceleration), from this the coefficient of friction can be found easily.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: 2 force practice problems
  1. Practice problem (Replies: 1)

  2. Practice Problems (Replies: 1)

Loading...