åˆé€Ÿåº¦çš„æ°´å¹³å’Œåž‚ç›´åˆ†é‡ç›¸ç‰: \( v_{x} = v \cdot \sin(45^\circ) = 20 \cdot rac{\sqrt{2}}{2} = 10\sqrt{2} \, ext{m/s} \)

Tue, 05 May 2026 11:47:16 +0000

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