A 72-kg water skier is being accelerated by a ski boat on a flat (“glassy") lake. The coefficient of kinetic friction between the skier's skis and the water surface is Mk = 0.25 (Fig. 4–74). (a) What is the skier's acceleration if the rope pulling the skier behind the boat applies a horizontal ten- sion force of magnitude FT = 240 N to the skier (0 = 0°)? (b) What is the skier's horizontal acceleration if the rope pulling the skier exerts a force of FT = 240 N on the skier at an upward angle 0 = 12°? (c) Explain why the skier's acceleration in part (b) is greater than that in part (a). FT = 240 N Mk = 0.25 FIGURE 4-74 Problem 91.

A 72-kg water skier is being accelerated by a ski boat on a flat (“glassy") lake. The coefficient of kinetic friction between the skier's skis and the water surface is Mk = 0.25 (Fig. 4–74). (a) What is the skier's acceleration if the rope pulling the skier behind the boat applies a horizontal ten- sion force of magnitude FT = 240 N to the skier (0 = 0°)? (b) What is the skier's horizontal acceleration if the rope pulling the skier exerts a force of FT = 240 N on the skier at an upward angle 0 = 12°? (c) Explain why the skier's acceleration in part (b) is greater than that in part (a). FT = 240 N Mk = 0.25 FIGURE 4-74 Problem 91.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter13: Gravitation

Section: Chapter Questions

Problem 13.2CYU: Check Your Understanding How does your weight at the top of a tall building compare with that on the...

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