Recent content by pochemuchka

  1. pochemuchka

    Acceleration needed to keep an object from sliding down a windshield

    UGH I can't believe I didn't see that. The masses and Fnorm cancels out, giving me tan30-tan60=g/a. Thanks so much!
  2. pochemuchka

    Acceleration needed to keep an object from sliding down a windshield

    Any help on the previous reply?
  3. pochemuchka

    Acceleration needed to keep an object from sliding down a windshield

    Normal force usually is -mg, but in this case it will be -mg+the force applied on it by the accelerating window. The right hand side is the y-components of the frictional force and normal force. For the x-direction, my equation would be Fnet=ma, with Fnet being the forces in the x-direction...
  4. pochemuchka

    Acceleration needed to keep an object from sliding down a windshield

    I think I am on the right path but I'm having trouble cancelling out the mass of the wallet. I drew a free body diagram and know that there are three forces acting on the wallet: gravity, friction, and normal force (including the van's acceleration). The y-component of the friction and normal...