問題詳情
4.A 50-lb block is acted upon by an 80 lbs force as shown in Figure 4. If the block is initially at rest, determine its velocity after it has traveled a distance of 10 ft. Assume coefficient of kinetic friction between the block and the plane to be 0.2. (30%)
參考答案
答案：B
難度：簡單0.727873
統計：A(42),B(1653),C(18),D(382),E(0)
用户評論
【用戶】Peggy Chen
【年級】高一下
【評論內容】自我語言(獨語)增進自我理解與自我溝通上的認知。
【用戶】梁靜雯
【年級】國三下
【評論內容】"(D)幼兒遊戲時的自言自語，反映了自我中心的認知特性"是Piaget前運思期的主張