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[1997年][ETV]小學六年級常識科 - 齒輪和滑輪 Part 1

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Uploaded by on Nov 13, 2009

[1997年][ETV]小學常識科 - 齒輪和滑輪

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  • 功率 P = 轉動動力 T x 轉動速度 W。比方說騎單車,如果雙腳用同樣的馬力 P 去踩,用低波 W 會較小 (較慢),但因 T 較大,所以上斜更好力,平路加速更好。

  • 片中小男孩是esmond chow的童年...見到佢個黑人憎樣就想打佢呀:)

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  • 左思蓓

  • 好強嘅師奶

  • 0:22 扶手電梯反光有架飛機降落啟德,I miss Kai Tak!

  • 小燕呀

  • This programme is year 1997 by RTHK.

  • 西九龍中心

  • 西九龍中心...

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