Find the magnitude of the vector sum r of the vector displacements c and d ?
2020-09-22 1:31 pm
Find the magnitude of the vector sum r of the vector displacements c and d whose components in meters along three perpendicular directions are cx= 7.6, cy= -3.9, cz= -6.2; dx= 4.2, dy= -2.4, dz= 3.1;
回答 (1)
2020-09-22 2:05 pm
Magnitude of the vector sum r
= √[(cx + dx)² + (cy + dy)² + (cz + dz)²
= √[(7.6 + 4.2)² + (-3.9 - 2.4)² + (-6.2 + 3.1)²]
= √188.54
≈ 13.73
= √[(cx + dx)² + (cy + dy)² + (cz + dz)²
= √[(7.6 + 4.2)² + (-3.9 - 2.4)² + (-6.2 + 3.1)²]
= √188.54
≈ 13.73
收錄日期: 2021-04-24 08:02:33
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https://hk.answers.yahoo.com/question/index?qid=20200922053151AAyz4gc