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tantahuu940
2 năm trước
1 vật có khối lượng 5kg được kéo đều lên mặt phẳng nghiêng với 1 lực bằng 0,6 lần trọng lượng. tính lực kéo vật khi độ cao mặt phẳng nghiêng tăng lên 0,2m còn độ dài của mặt phẳng không đổi. cho biết cứ tăng 10cm chiều kéo thì lực kéo tăng lên 0,01 lần trọng lượng
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