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1.
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振动使土壤的抗剪强度下降是切削阻力下降的主要原因，同时，铲斗与土壤间摩擦力和粘附力下降，也是切削阻力下降的原因之一。
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2.
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突然发现牛顿好给力，拉力、浮力、推力、摩擦力，重力、压力、阻力、支持力。
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3.
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在进行高山滑雪运动时，雪板与雪地之间的摩擦力、空气阻力以及推雪阻力都是影响高山滑雪运动员滑行阻力的主要因素。
※ "摩擦力"造句
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怎祝网汉语词典查词提供。