A 71 kg skier encounters a dip in the snows surface that, Ask an Expert

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Q1. A major-league catcher gloves a 81 mi/h pitch and brings it to rest in 0.15 m. If the force exerted by the catcher is 803 N, what is the mass of the ball?

Q2. A 71 kg skier encounters a dip in the snow's surface that has a circular cross section with a radius of curvature of 12 m. If the skier's speed at point A is 7.0m/s , what is the normal force exerted by the snow on the skier at point B? Ignore frictional forces.

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