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An Introduction to Physical Science

14th Edition

ISBN:9781305079137

Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Chapter15: Place And Time

Section: Chapter Questions

Problem 1E: What is the number of latitude degrees between place A (50N, 90W) and place B (60S, 90E)?

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Question

A contestant in a winter sporting event pushes a 45 kg block of ice in the positive direction across a frozen lake as shown in the figure. Assume the coefficients of static and kinetic friction are μ_s=0.1 and μ_k=0.03.

a. Calculate the minimum force F he must exert to get the block sliding across the ice in newtons.

b. What is its acceleration once it starts to move, if that force is maintained in m/s²?

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