Phys 141_HW Sol_Ch1_W08

# Phys 141_HW Sol_Ch1_W08 - Cal Poly State University SLO...

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Cal Poly State University, SLO D. Niebuhr Physics Department Winter 2008 Phys 141 Homework Solutions Chapter 1 Assigned Problems: 4, 6, 10a, b, 16, 21 23, 30, 33, 34, 38, 41, 50, 54, 57 1.4. Solve: Position refers to the location of an object at a given time relative to a coordinate system. Dis- placement, on the other hand, is the difference between the object’s final position at time t 1 and the initial position at time t 0 . Displacement is a vector, whose direction is from the initial position toward the final position. An airplane at rest relative to a runway lamp, serving as the origin of our coordinate system, will have a position, called the initial position. The location of the airplane as it takes off may be labeled as the final position. The difference between the two positions, final minus initial, is displacement. 1.6. Solve: The player starts from rest and moves faster and faster (accelerates). 1.10. Solve: (a) Acceleration is found by the method of Tactics Box 1.3. Let 0 v r be the velocity vector between points 0 and 1 and 1 v r be the velocity vector between points 1 and 2. (b) Speed 1 v is greater than speed 0 v because more distance is covered in the same interval of time. 1.16. Model: Represent the tennis ball as a particle.

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Cal Poly State University, SLO D. Niebuhr Physics Department Winter 2008 Phys 141 Visualize: The particle falls freely for the three stories under the acceleration of gravity. It strikes the ground and very
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Phys 141_HW Sol_Ch1_W08 - Cal Poly State University SLO...

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