Results 1 to 9 of 9

Math Help - Do I have this right?

  1. #1
    Member
    Joined
    Jan 2009
    From
    Ontario Canada
    Posts
    234

    Thumbs up Do I have this right?

    Car held in place on ramp by 2 forces. One is 2140N by the brakes, which holds it from rolling down the ramp. The other is a reaction force by the ramp of 9850N, perpendicular to the ramp. This forces keeps the car from going thru the ramp.

    What is the weight of the car and what angle with the horizontal is the ramp inclined.

    I found the weight as 10080N and theta as 12.26 degree.

    Do I have this correct?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor Unknown008's Avatar
    Joined
    May 2010
    From
    Mauritius
    Posts
    1,260
    Yes, it's good. Sorry, I did a calculator mistake...

    mg = \dfrac{9850}{cos(12.26)} = 10080 N
    Last edited by Unknown008; November 1st 2010 at 11:10 PM. Reason: I think I pressed 9880 in my calculator instead of 9850... several times... =s
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Sep 2009
    Posts
    177
    Thanks
    1
    What the hell is wrong with you? Why would you post that. Someone please ban him.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Member
    Joined
    Jan 2009
    From
    Ontario Canada
    Posts
    234
    Awesome, thanks.
    If you use 12.6 degree in stead, you get what my weight is. Thanks to confirm!!!!!!!!
    Follow Math Help Forum on Facebook and Google+

  5. #5
    MHF Contributor Unknown008's Avatar
    Joined
    May 2010
    From
    Mauritius
    Posts
    1,260

    What the hell is wrong with you? Why would you post that. Someone please ban him.
    What?
    Follow Math Help Forum on Facebook and Google+

  6. #6
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,875
    Thanks
    656
    Quote Originally Posted by Unknown008 View Post
    What?
    don't know what he meant by that ... but I do get mg = 10080 N
    Follow Math Help Forum on Facebook and Google+

  7. #7
    MHF Contributor Unknown008's Avatar
    Joined
    May 2010
    From
    Mauritius
    Posts
    1,260
    I'm still getting 10110 N... =/

    EDIT: I think... I put in 9880 in my calculator instead of 9850... now, how could this happen thrice in a row?

    Thanks for checking... I really don't know how I made this error...
    Follow Math Help Forum on Facebook and Google+

  8. #8
    Member
    Joined
    Sep 2009
    Posts
    177
    Thanks
    1
    Quote Originally Posted by skeeter View Post
    don't know what he meant by that ... but I do get mg = 10080 N
    lol. Sorry. That was in response to someone who had posted some obscene photos on pretty much every thread he visited as a consequence of not have gotten what he considered a satisfactory answer.
    Follow Math Help Forum on Facebook and Google+

  9. #9
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,875
    Thanks
    656
    Quote Originally Posted by Chris11 View Post
    lol. Sorry. That was in response to someone who had posted some obscene photos on pretty much every thread he visited as a consequence of not have gotten what he considered a satisfactory answer.
    note the small triangular icon on the lower left of each post ... use it to report any improper post to a moderator.
    Follow Math Help Forum on Facebook and Google+


/mathhelpforum @mathhelpforum