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【简答题】
一位质量m=60kg的滑雪运动员从高h=10m的斜坡自由下滑.如果运动员在下滑过程中受到的阻力F=50N,斜坡的倾角θ=30°,运动员底的过程中,重力所做的功是( ),摩擦力所做的功是( )。
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