test4 - TEST 4(phy 240 1 a For what type of rigid bodies...

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

View Full Document Right Arrow Icon
TEST 4 (phy 240) 1. a) For what type of rigid bodies does angular velocity have the same direction as angular momentum? b) Write the law of angular momentum conservation. c) Why are fluids good lubricants? d) What is described by strain? 2. A uniform rod of length L and mass M is free to rotate on a frictionless pin passing through one end (as in the figure). The rod is released from rest in the horizontal position. a) Show that the rotational inertia of the rod (about the pin) is 2 z ML 3 1 I = . b) Determine the initial angular acceleration of the rod. c) Determine the force exerted by the pin at the initial moment. 3. An open tank containing water has a hole in its side at a distance h from the tank’s bottom. The hole is open to the atmosphere, and its diameter is much smaller than the diameter of the tank. a) Determine the speed at which liquid flows out of the hole when the water’s level is at distance y above the hole. b) At what rate does the level in the tank change. 4. A shelf bracket is mounted loosely on a vertical wall by a single, 4 mm in diameter, steel 2 screw (as shown in Figure P12.53). The shelf exerts an 80 N force with its center 5 cm from the wall. Ignoring the weight of the bracket and the frictional force between the bracket and the wall, find a) the force (vector) exerted on the screw by the bracket.
Image of page 1

Info iconThis 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