{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

10_01_2D_2nd_law - acceleration d Find the velocity when...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Physics 211 10/1 HW Handout Due Thur 10/4 Fall 2001 2 nd Law in 2D 1) A 10kg cart rolls from rest down a ramp a distance of 5m along the slope. The angle is such that the ramp forms a 3-4-5 right triangle. Let g = 10N/kg for this problem. a) Label the forces in the free body diagram at right, including arrows showing the directions of the acceleration and the net force. b) Find the components of the weight force in the x and y directions on the coordinate systen given. Show your work or reasoning. Hint: The weight force is the hypotenuse of a 3-4-5 right triangle and the sides are the components. c) Identify the net force on the cart and find the acceleration, you should already know the direction of both. Show how you find the net force and the
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: acceleration. d) Find the velocity when the cart has moved a distance of 5m down the ramp as shown. You will need to find the time. Show your reasoning. e) Now find the same final velocity using energy and “work.” Show your reasoning using the work energy relation. f) Now do one more thing. Find the final velocity using the vertical height (3m). Multiplying mg times this height gives the “change in potential energy” and also equals the -∆ KE as found in e. ∆ PE = mg ∆ h and ∆ h is negative so ∆ PE is a negative number. ∆ KE is the negative of ∆ PE so ∆ KE is a positive number and means that KE increased. 3m 5m 4m a = F net = x y...
View Full 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