Answer
ROTATIONAL MOTION
旋轉運動
WINDOW QUESTION · ANSWERBUILD CLUB
The question
WHICH TYPE OF MOTION DO THE CLEANING CAR’S FRONT PADDLES USE TO PUSH DIRT ASIDE?
清潔小車前方的槳片用哪一種運動把髒東西推開？
Why it works
AS THE CAR MOVES, THE FRONT PADDLES SPIN AND PUSH DIRT ASIDE
車輪前進時也帶動槳片旋轉，把路上的髒東西推到旁邊
See it in action · STUDENT INVENTION: CLEANING CAR
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