质量为M的物体静止在粗糙的水平面上,若物体受一水平力F作用通过位移S时,它的动能为E1,若这一静止物体受水平力2F通过相同位移时,其动能为E2,则()A.E2=E1 B.E2=2E1 C.E2>2E2 D.E1
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![质量为M的物体静止在粗糙的水平面上,若物体受一水平力F作用通过位移S时,它的动能为E1,若这一静止物体受水平力2F通过相同位移时,其动能为E2,则()A.E2=E1 B.E2=2E1 C.E2>2E2 D.E1](/uploads/image/z/6768571-67-1.jpg?t=%E8%B4%A8%E9%87%8F%E4%B8%BAM%E7%9A%84%E7%89%A9%E4%BD%93%E9%9D%99%E6%AD%A2%E5%9C%A8%E7%B2%97%E7%B3%99%E7%9A%84%E6%B0%B4%E5%B9%B3%E9%9D%A2%E4%B8%8A%2C%E8%8B%A5%E7%89%A9%E4%BD%93%E5%8F%97%E4%B8%80%E6%B0%B4%E5%B9%B3%E5%8A%9BF%E4%BD%9C%E7%94%A8%E9%80%9A%E8%BF%87%E4%BD%8D%E7%A7%BBS%E6%97%B6%2C%E5%AE%83%E7%9A%84%E5%8A%A8%E8%83%BD%E4%B8%BAE1%2C%E8%8B%A5%E8%BF%99%E4%B8%80%E9%9D%99%E6%AD%A2%E7%89%A9%E4%BD%93%E5%8F%97%E6%B0%B4%E5%B9%B3%E5%8A%9B2F%E9%80%9A%E8%BF%87%E7%9B%B8%E5%90%8C%E4%BD%8D%E7%A7%BB%E6%97%B6%2C%E5%85%B6%E5%8A%A8%E8%83%BD%E4%B8%BAE2%2C%E5%88%99%28%29A.E2%3DE1+B.E2%3D2E1+C.E2%3E2E2+D.E1)
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