
Concept explainers
Tetherball A tetherball weighing 1 pound is pulled outward from the pole by a horizontal force u until the rope makes an angle of θ degrees with the pole (see figure).
(a) Determine the resulting tension in the rope and the magnitude of u when θ=30∘.
(b) Write the tension T in the rope and the magnitude of u as functions of θ. Determine the domains of the functions.
(c) Use a graphing utility to complete the table.
θ |
0° |
10° |
20° |
30° |
40° |
50° |
60° |
T |
|||||||
‖u‖ |
(d) Use a graphing utility to graph the two functions for 0∘≤θ≤60∘.
(e) Compare T and ‖u‖ as θ increases.
(f) Find (if possible)
limθ→π/2−T and limθ→π/2+‖u‖
Are the results what you expected? Explain.

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Chapter 11 Solutions
Bundle: Calculus, 10th + WebAssign Printed Access Card for Larson/Edwards' Calculus, 10th Edition, Multi-Term
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