A50 kg ice skater is gliding along the ice, heading due north at 4.0 m/s. the ice has a small coefficient of static friction, to prevent the skater from slipping sideways, but mk = 0. suddenly, a wind from the northeast exerts a force of 4.0 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 ms that allows her to continue moving straight north?

Explanation:

It is given that,

Mass of the ice skater, m = 50 kg

Initial speed of the car, u = 4 m/s

The force is exerted due north east direction, F = 4 N

Angle,

(a) Let v is the speed of the skater after gliding 100 m in this wind. Using the work energy theorem to find it :

v = 5.22 m/s

(b) Let is the coefficient of static friction that allows her to continue moving straight north. It is given by :

Hence, this is the required solution.

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