Results 1 to 3 of 3
Like Tree1Thanks
  • 1 Post By skeeter

Math Help - mechanics M1 Alevel

  1. #1
    Member
    Joined
    Nov 2012
    From
    hyderabad
    Posts
    96

    mechanics M1 Alevel

    A BODY OF MASS 5KG IS INITIALLY AT REST AT THE BOTTOM OF A ROUGH INCLINED PLANE OF LENGTH 6.3M THE PLANE IS INCLINED AT 30 DEGREES TO THE HORIZONTAL AND THE COEFFICIENT OF FRICTION BETWEEN THE BODY AND THE PLANE IS 0.3 a constant horizantal force of 60.6N is applied to the body causing it to accelerate up the plane find the time taken for the body to reach the top and its speed on arrival.
    Answers 3s, 4.2ms^-1
    My Attempt MA=60.6 - {(0.3*5gCos30)+(5gsin30)} but i stuck here i dont know where to start from help
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    Joined
    Jun 2009
    Posts
    660
    Thanks
    133

    Re: mechanics M1 Alevel

    If the applied force is horizontal then to get its component along the slope you need to multiply by cos30, and it will also make a contribution to the normal reaction and hence the force due to friction. What are you taking g to be equal to ?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,700
    Thanks
    454

    Re: mechanics M1 Alevel

    Quote Originally Posted by abdulrehmanshah View Post
    A BODY OF MASS 5KG IS INITIALLY AT REST AT THE BOTTOM OF A ROUGH INCLINED PLANE OF LENGTH 6.3M THE PLANE IS INCLINED AT 30 DEGREES TO THE HORIZONTAL AND THE COEFFICIENT OF FRICTION BETWEEN THE BODY AND THE PLANE IS 0.3 a constant horizantal force of 60.6N is applied to the body causing it to accelerate up the plane find the time taken for the body to reach the top and its speed on arrival.
    Answers 3s, 4.2ms^-1
    My Attempt MA=60.6 - {(0.3*5gCos30)+(5gsin30)} but i stuck here i dont know where to start from help
    applied force component up the incline - weight component down the incline - friction force down the incline = net force

    F\cos{\theta} - mg\sin{\theta} - \mu(mg\cos{\theta} + F\sin{\theta}) = ma
    Thanks from abdulrehmanshah
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Mechanics
    Posted in the Calculus Forum
    Replies: 10
    Last Post: September 11th 2010, 08:29 AM
  2. Mechanics
    Posted in the Calculus Forum
    Replies: 4
    Last Post: May 6th 2009, 02:10 PM
  3. Maths Mechanics SUVAT mechanics
    Posted in the Calculus Forum
    Replies: 2
    Last Post: April 27th 2009, 04:55 PM
  4. Maths Mechanics SUVAT mechanics
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: April 27th 2009, 03:44 PM
  5. need some help in Alevel maths
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: March 31st 2008, 10:43 PM

Search Tags


/mathhelpforum @mathhelpforum