physic物理问题英文1.Zak,helping his mother rearrange the furniture
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physic物理问题英文
1.Zak,helping his mother rearrange the furniture in their living room,moves a 50-kg sofa 6 meters with a constant forces of 20 newtons.Neglecting friction,
A.what is the work done by Zak on the sofa?
B.what is the average acceleration of the sofa?
1.Zak,helping his mother rearrange the furniture in their living room,moves a 50-kg sofa 6 meters with a constant forces of 20 newtons.Neglecting friction,
A.what is the work done by Zak on the sofa?
B.what is the average acceleration of the sofa?
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zlf57 共回答了25个问题
|采纳率84%- A.W = Fs = 20N * 6m = 120N
B.a = F/m = 20N / 50kg = 0.4 m/s^2 - 1年前
梦游-百合 共回答了8个问题
|采纳率- A. 120J
B. 0.4m/s^2 - 1年前
tigerese 共回答了21个问题
|采纳率- Zak要帮妈妈搬家具,想把一个重为50kg的沙发移动6米,用一大小为20牛顿的恒力,不考虑摩擦力
问A?
B平均加速度是多少?
A B a=20/50=0.4m/s^2 - 1年前
tytp4 共回答了9个问题
|采纳率- A 问你这个人做功多少
即20N*60m=1200J
B 问你加速度是多少
由于体重所给的是忽略摩擦
所以合力就是20N
a=F(合)/m=20N/50Kg=0.4m/s^2 - 1年前
NEMNEM 共回答了6个问题
|采纳率- 首先,题目如下:
1.zak帮助妈妈整理卧室家具,用20牛的恒力将50千克的沙发推动6米。忽略摩擦力。
a。他对沙发做功多少?
b。沙发的平均加速度是多少?
答案是:
1。推力乘以推动距离即为120瓦
1.由于忽略摩擦,故加速度就是推力除以沙发质量为10/3 (m/s.s)... - 1年前
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