Phys+117+-+F15+-+Test+04+-+V1.pdf

# Phys+117+-+F15+-+Test+04+-+V1.pdf - UBC Physics 117 F15...

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UBC Physics 117, F15 Test 4 Nov 2 Name ________________________________________ Preferred name ________________________________ Version 1 Fill in the bubbles: Student Number: 1 2 3 4 5 6 7 8 9 0 Quiz reflection assignment: Your quiz reflection assignment was graded as complete. Your quiz reflection assignment was incomplete. Please see comments in the individual questions.

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Q1. Diagnosis Phase (what I was thinking when I made my mistake): Correction Phase (how to fix my mistake): Grader use only: Reflection for this question is complete. Reflection for this question is incomplete. Please revise as follows: Q2. Diagnosis Phase (what I was thinking when I made my mistake): Correction Phase (how to fix my mistake): Grader use only: Reflection for this question is complete. Reflection for this question is incomplete. Please revise as follows:
Q1 [2pts]. A mass m is at the end of light (massless) rod of length R . On the other end of rod there is a frictionless pivot (a point around which the rod rotates) so that the rod can swing in a vertical plane (with the ground below as shown in the figure). The rod is initially horizontal at position A. The mass is pushed down from position A with an initial speed v 0 . What is the minimum initial kinetic energy required for the mass to be able to pivot from position A to position B?

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