
11.牛頓三大定律,騎腳踏車
Interactive Video
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Science
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9th Grade
•
Hard
chungtsenchen01 chungtsenchen01
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4 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
為什麼啟動自行車比以恆定速度騎行更困難?
因為自行車的輪胎很重。
因為需要克服慣性。
因為自行車的鏈條很緊。
因為地面摩擦力太大。
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
根據牛頓第二定律,以下哪項陳述是正確的?
施加的力越大,加速越慢。
物體的質量越大,加速所需的力越小。
力是質量乘以加速度的乘積。
物體加速時,質量會減少。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
如果自行車和騎車者的總質量增加,要達到相同的加速度,需要施加什麼樣的力?
更小的力。
更大的力。
相同的力。
力的大小與質量無關。
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
自行車向前移動是基於牛頓第三定律的什麼原理?
自行車輪胎順時針旋轉。
地面對輪胎施加向前的反作用力。
騎車者向下踩踏板的力。
自行車的慣性。
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