Use work and energy to find the skater’s speed after gliding 100 m in this wind.

By Allen Kazadi

A 54.0 kg ice skater is gliding along the ice, heading due north at 4.10 m/s . The ice has a small coefficient of static friction, to prevent the skater from slipping sideways, but Uk = 0. Suddenly, a wind from the northeast exerts a force of 3.70 N on the skater.a) Use work and energy to find the skater’s speed after gliding 100 m in this wind.b) What is the minimum value of Ug that allows her to continue moving straight north?

Answer:

a. 2.668 m/s

b. 0.00494

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