Recent content by IbrahimA

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    High School Dynamics and Kinematics Interview Question Examples

    I've legit never heard of a conservative force, I don't think we ever learned it.
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    High School Dynamics and Kinematics Interview Question Examples

    So, my teacher is going to do almost like an interview to the class, asking our knowledge about Dynamics and Kinematics, and I was wondering if I can get questions to test my knowledge in Dynamics and Kinematics to get ready for it.
    • IbrahimA
    • Thread
    • Dynamics Interview Kinematics Physcis
    • Replies: 4
    • Forum: Mechanics
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    Explain why this is correct (Optimization Problem)

    Homework Statement A piece of wire, 100 cm long, needs to be bent to form a rectangle. Determine the dimensions of a rectangle with the maximum area. Homework Equations P = 2(l+w) A = lw The Attempt at a Solution This is what I don't understand, the solutions that I saw from looking around...
  4. I

    Dynamics Skier on a Slope Problem

    Oh okay, now it makes sense. Thank you.
  5. I

    Dynamics Skier on a Slope Problem

    Algebra Question In the equation as shown below: (m)(a) = (u)(g)(m)(cos4.7) + (m)(-g)(sin4.7) Can I cancel out all the m's on both sides and result into this?: a = (u)(g)(cos4.7)+(-g)(sin4.7) Or is that not possible?
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    Dynamics Skier on a Slope Problem

    I have redone my equations, with: Equation 1 : Fn = a + gsin4.7 / u Equation 2 : Fn = mgcos4.7 But again same situation, there are still two unknowns being m and a, since I can't cancel out m on the y-axis as shown below: Fnety = Fn + (-Fgy) 0 = Fn + (m)(-g)(cos47) Fn = mgcos4.7
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    Dynamics Skier on a Slope Problem

    Fa is the applied force that the skier is pushing on the ski poles thus moving up the incline.
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    Dynamics Skier on a Slope Problem

    Looking back at equation 2, I feel like the net force on the y-axis is 0. Because from my understanding, the skier is only moving on the x-axis being on the incline, where the forces on the y-axis are cancelling each other out. Correction of equation 2: Fn = gcos4.7 But even then that still...
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    Dynamics Skier on a Slope Problem

    Homework Statement A skier on a slope inclined at 4.7 degrees to the horizontal pushes on ski poles and starts down the slope. The initial speed is 2.7 m/s. The coefficient of kinetic friction between skis and snow is 0.11. Determine how far the skier will slide before coming to rest. Answer...
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    What are the forces acting on a child pulling a wagon up an inclined hill?

    I literally just checked it now, its was on radians. I redid the calculations and they are correct. Thank you so much.
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    What are the forces acting on a child pulling a wagon up an inclined hill?

    Homework Statement A child is pulling a wagon of mass 7.38 kg up a hill inclined at an angle of 14.3 degrees to the horizontal. The child applies a force parallel to the hill. The acceleration of the wagon is 6.45 cm/s^2 up the hill. Friction is negligible. Determine the magnitude of (a) the...