Lab 4

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
The Mass-Dependence of Friction 1. Make free-body diagrams of a cart moving up and down the track. Label the forces. 2. Based on the above, write out Newton’s Second Law for each direction for both situations. Remember to show your work, eg., the arguments for your derivation of the variable f. 3. Solve the above equations for N, f, and μ. Answers must be in terms of m, g, a u , a d , and θ. Remember to show your work. 4. Insert into the box the v x (t) graphs for the three measurements, with data and boxes readable. WPI Physics Department 1 PH 1110 2014-15 Name and section number: Emily Stratton Partner’s name and section number: Josh Boynton Up: Σ F x = ma u = Down: Σ F x = ma d = Σ F y = 0 = Σ F y = 0 = N = m g cos ( θ ) f = m 2 ∗( a u a d ) μ = ( a u a d ) 2 g cos ( θ )
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
WPI Physics Department 2 PH 1110 2014-15 a) b) c)
Image of page 2
5. Fill in this table, stating the units within the square brackets, and using four significant figures. If you are pressed for time, collect data now (yellow boxes) and calculate later (green). Trial θ [°] m [kg] a u [m/s 2 ] a d [m/s 2 ] N [] f [] μ [] 1 3.92 0.498
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern