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Society of Physics Students

Society of Physics Students. SPS Meeting Thursday, September 15 1:00 to 1:50 pm Wubben 218. We will discuss our upcoming conference and perform a physics demo. If you are interested in physics and getting involved with SPS, please come to meeting. There will be pizza!.

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Society of Physics Students

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  1. Society of Physics Students SPS Meeting Thursday, September 15 1:00 to 1:50 pm Wubben 218 We will discuss our upcoming conference and perform a physics demo. If you are interested in physics and getting involved with SPS, please come to meeting. There will be pizza!

  2. Announcements • Exams will be returned at the END of class TODAY! • Homework for tomorrow… (Ch. 4, Probs. 20, 23 & 28) • Office hours… M 3-4 pm TWR 9-10 am F 1-2 pm • Tutorial Learning Center – Houston Hall 113 MWR 8 am-6 pm T 8 am-7 pm F 8 am-5 pm

  3. Chapter 4 Vectors (Problem Session)

  4. Any 3D vector in terms of it’s vector components.. If & Then the vector sum is where Last time…

  5. Touchstone Example 4.3 Figure 4-15a shows the following three vectors: What is their vector sum , which is also shown?

  6. Section 4.7: Multiplying and Dividing a Vector by a Scalar Given , what is ? Notice: Multiplying a vector by a scalar ONLY changes the magnitude, NOT the orientation!

  7. Reading Exercise 4-8 a. A particle of mass m = 3 kg undergoes an acceleration given by Calculate the vector representing the net force acting on the particle. • A particle undergoes a displacement vector in the time interval of t = 0.5 s. Calculate the vector describing the particle’s average velocity.

  8. Prob 4.19: Two vectors are given by In unit-vector notation, find • a third vector such that

  9. Prob 4.24: In the sum , the vector has a magnitude of 12.0 m and is angled 40.0º counterclockwise from the +x direction, and vector has a magnitude of 15.0 m and is angled 20.0º counterclockwise from the -x direction. What are • the magnitude and • the angle (relative to +x) of ?

  10. Prob 4.29: A Cube • Using unit vectors, write expressions for the four body diagonals (the straight lines from one corner to another through the center) of a cube in terms of its edges, which have length a. • Determine the angles that the body diagonals make with the adjacent edges. • Determine the length of the body diagonals in terms of a.

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