
國二下理化 力與平衡.摩擦力
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Medium
曾鋒 老師
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12 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
小明參加夾豆子比賽,當筷子夾住豆子靜止於空中時,豆子不會掉下來的主要原因為何?
筷子與豆子間的靜摩擦力小於豆子的重量
筷子與豆子間的動摩擦力等於豆子的重量
筷子與豆子間的動摩擦力大於豆子的重量
子與豆子間的靜摩擦力等於豆子的重量
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
有一物體重量為13 kgw,靜置於水平桌面上 。若 物體兩側分別施以在同一直線上的水平作用力 20 kgw和15 kgw,發現物體仍靜止不動,如下圖所 示,則該物體所受摩擦力的大小為下列何者?
2公斤重
5公斤重
13公斤重
35公斤重
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
阿升取一木塊和若干砝碼,已知木塊重200 gw,每個砝碼重100 gw,在相同的接觸面上測得最大靜摩擦力的結果如附表,若在木塊加上5個砝碼,則最大靜摩擦為?
125公克重
150公克重
175公克重
200公克重
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
有關摩擦力的敘述,下列何者正確?
物體靜止不動時,必受到摩擦力的影響
物體靜止時,摩擦力必大於推力
摩擦力的方向必和推力的方向相同
在同樣的條件下,最大靜摩擦力必大於動摩擦力
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下圖為爬竿比賽的裝置,在人順著竿子往上爬的過程中,主要是依靠何種力量支撐而不致於往下滑?
人體與地球之間的吸引力
人體與竿子之間的摩擦力
竿子與地面之間的作用力
竿子拉人的力
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
一彈簧在彈性限度內受到
外力10克重,伸長2公分,
則如附圖裝置時,彈簧伸長多少公分?
0.5
1
2
4
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如圖所示,實驗裝置呈靜力平衡。
已知鋼圈的重量為150gw,物體W的重量為450gw,
兩彈簧秤的重量很微小可忽略不計,則乙彈簧秤指針
所指的刻度應為下列何者?
150 gw
450 gw
300 gw
600 gw
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