![enter image description here](https://i.stack.imgur.com/J3jd7.jpg)

Can you help me please? I can't recognize this kanji with red arrow
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2014-06-27T15:34:57.993
17585
2014-06-27T16:25:42.493
2014-06-27T16:25:42.493
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question
kanji handwriting
Recognizing this kanji: ホイールが【?】いよく回転
> [勢]{いきお}い

です・・・。

（文字数が足りない・・・）
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2014-06-27T15:46:17.027
17586
2014-06-27T15:46:17.027
17585
answer