{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Test_2_A - PHYS 2425 Dr Honan Test 2 A Possibly Useful...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
PHYS 2425 - Dr. Honan - Test 2 - A Name _____________ Possibly Useful Information: g = 9.80m/s 2 Problem 1 Short answer (4 points each) ______ [i] The coefficients of kinetic and static friction between a 1000 lb refrigerator and floor are 0.40 and 0.45 . When at rest the refrigerator is pushed with a horizontal force of 300 lb. What is the force of friction between the refrigerator and floor? (a) 300 lbs (b) 400 lbs (c) 450 lbs (d) 850 lbs (e) 1000 lbs (f) 1300 lbs (g) none of the above ______ [ii] A car drives up a hill at a constant speed. What are the signs of the changes in kinetic energy and potential energy? (a) Δ K > 0, Δ U > 0 (b) Δ K > 0, Δ U = 0 (c) Δ K > 0, Δ U < 0 (d) Δ K = 0, Δ U > 0 (e) Δ K = 0, Δ U = 0 (f) Δ K = 0, Δ U < 0 (g) Δ K < 0, Δ U > 0 (h) Δ K < 0, Δ U = 0 (i) Δ K < 0, Δ U < 0 (j) It cannot be determined. Problem 2 A mass m 1 slides on a horizontal surface with a coefficient of kinetic friction μ k . It is connected by a rope to a hanging mass m 2 over the pulley arrangement shown. What is the downward acceleration of the hanging mass m 2 ?
Image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
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