第三章第六章動量與碰撞
Physical Ed
11th Grade
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25 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
某物質量為2.0 kg，初速3.0 m/s向東；受力作用5.0 s後，末速為4.0 m/s向西，則所受動量變化大小為多少N．s？
2.0
6.0
8.0
12.0
14.0
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
原為靜止的物體爆裂成3塊，已知碎塊皆在同一水平面上，且質量皆相等，若甲以8 m/s向東飛出，丙以6 m/s向南飛去，則乙的動量方向為何?
向西偏北
向西偏南
向東偏南
向東偏北
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
質量2 kg的物體A以10 m/s速度撞上1 kg的靜止物體B，撞後A沿原運動方向以5 m/s前進，則撞後B的速率為何？
8 m/s
10 m/s
12 m/s
15 m/s
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
設於無摩擦之桌面上置有7個相同的鋼球，其中四個接連排放一列，另三個自左方以速度v正面彈性碰撞此四球，如圖所示。假設為彈性碰撞，則碰撞後有幾個球離開？
1
2
3
4
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
質量m的紅皮球(左球)向質量同為m的綠皮球(右球)相向作正向彈性碰撞，紅皮球的速率為v、綠皮球的速率為v/4，如圖，則碰撞後紅皮球的速率為何？
v/4
v/3
v/2
v
2v
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
質量分別為10公斤和5公斤的兩球以附圖速度作一維碰撞，試問哪一張圖可能是其碰撞後的結果？
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若兩物體發生碰撞，碰撞前後系統總動能守恆，則兩者屬於何種碰撞？
彈性碰撞
非彈性碰撞
完全非彈性碰撞
正向碰撞
斜向碰撞
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