physics

a skater is sliding forward on a flat rink at 6 m/s. her mass is 71 kg. the sliding friction acting on her skate blade is 13.4 N acting backward. air resistance is 14.7 N acting backward. what is her horizontal acceleration?

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asked by Rob
  1. F=ma
    =>
    a=F/m
    F=-(13.4+14.7) N
    m=71 kg
    evaluate acceleration (should be negative)

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