牛頓由蘋果自樹上掉落的現象發現了萬有引力,試回答下列問題:
(1)蘋果從樹上鉛直掉落至地面的過程中,下列敘述何者正確? (a)

國三上理化Chap2_2 牛頓第二運動定律 2024 1031

Quiz
•
Physics
•
9th Grade
•
Hard
Sone Wang
FREE Resource
10 questions
Show all answers
1.
DROPDOWN QUESTION
2 mins • 10 pts
2.
DROPDOWN QUESTION
2 mins • 10 pts
牛頓由蘋果自樹上掉落的現象發現了萬有引力,試回答下列問題:
(2)此顆蘋果掉落至地面的瞬間,其加速度大小為多少? (a)
3.
FILL IN THE BLANK QUESTION
2 mins • 10 pts
一質量20公斤之玩具車以10m/s的速率在光滑水平面上做等速度運動,現施一水平力使其速率在2秒內增至20m/s,試回答下列問題:
(1)在受力作用的最初2秒內,玩具車的加速度大小為多少m/s2?
4.
FILL IN THE BLANK QUESTION
2 mins • 10 pts
一質量20公斤之玩具車以10m/s的速率在光滑水平面上做等速度運動,現施一水平力使其速率在2秒內增至20m/s,試回答下列問題:
(2)此玩具車所受之水平力大小為多少牛頓?
5.
MULTIPLE CHOICE QUESTION
2 mins • 10 pts
道路上交通瞬息萬變,請回答以下問題:
(1)在十字路口,綠燈一亮,大貨車和計程車一齊衝出,加速度大小相同且同時通過下一個十字路口,試問哪個車子引擎所發動的力量大?
與引擎力量無關
兩車發動的力量一樣大
計程車
大貨車
6.
DROPDOWN QUESTION
2 mins • 10 pts
道路上交通瞬息萬變,請回答以下問題:
(2)一輛質量為1500公斤的轎車,在水平路上以30m/s的速度行駛。突然有一顆球從路旁滾出,轎車緊急煞車,在3秒末完全停止。若轎車煞車時路面所提供的摩擦力大小固定,則在這段煞車期間,轎車所受的摩擦力大小為何? (a)
7.
FILL IN THE BLANK QUESTION
2 mins • 10 pts
一物體在光滑水平面上做等速度運動,速度大小為5m/s,今受一與運動方向同向之水平力作用2秒後,共移動30公尺,若物體質量為2公斤,試回答下列問題:
)(1)物體的加速度大小為多少m/s2?
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