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Ví dụ 4: Một con lắc lò xo có k = 16(N / m) treo thẳng đứng, đầu dưới treo vật có khối lượng 100 g. Vật đang ở vị trí cân bằng dùng lực F để kéo vật theo phương thẳng đứng rồi buông nhẹ thì nó dao động điều hoà với biên độ 5 cm, lấy g=10(m/s^ 2 ) . Tính F. A. 1,8N. B. 6,4N. C. 0,8N. 100 D. 3,2N 10 Milers
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Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)
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In order to do work, the force vector must be question 1 options: in a different direction than the acceleration vector. in a different direction than the displacement vector. in the same direction as the displacement vector and the motion. in the same direction as the acceleration vector.
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Which magnetic property best describes a magnet’s ability to act at a distance? magnets are dipolar. magnets attract only certain objects. magnets have magnetic fields. magnets can transfer their properties to certain materials.
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Ví dụ 4: Một con lắc lò xo có k = 16(N / m) treo thẳng đứng, đầu dưới treo vật có khối lượng 100 g....
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