推動玩具車後,為什麼我們沒有用力使它停止,它最終也會停下來呢?
回答 (2)
2008-03-28 9:22 pm
✔ 最佳答案
因為有摩擦力...指兩個表面接觸的物體作相對運動時互相施加的一種物理力。廣義地，物體在液體和氣體中運動時也受到摩擦力。
2008-03-29 10:56 pm
Yes, because of the existance of friction.
There is friction between the gear and the motor, between the different gears, and between the wheels and the ground.
These friction forces provide the resistance (deceleration) of the original motion (energy).
There is friction between the gear and the motor, between the different gears, and between the wheels and the ground.
These friction forces provide the resistance (deceleration) of the original motion (energy).
收錄日期: 2021-04-23 17:48:57
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