Physics, 29.07.2021 14:00 jflandersneongr

Treo 1 vật hình cầu có đường kính 2 dm , nặng 20 g vào lò xo a, tính trọng lượng của vật
b, chỉ ra các lực tác dụng lên vật
c, xác định khối lượng riêng của vật
d, nếu vật trên được làm bằng gỗ có khối lượng riêng là 800kg/m3 thì nó nặng bao nhiêu . biết thể tích ko thay đổi (giả gấp ạ )

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Treo 1 vật hình cầu có đường kính 2 dm , nặng 20 g vào lò xo a, tính trọng lượng của vật
b,...

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