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Worksheets牛顿第一定律
Total questions: 3
Worksheet time: 4mins
两位站着不动的胖子和瘦子，为什么把胖子撞倒会比把瘦子撞倒困难？
Two fat and thin men standing still, why is it more difficult to knock a fat man than a thin man?
因为撞胖子时会产生较强的反作用力
Because it will produce a strong reaction force when knocking fat man
因为胖子的质量大，因此他的惯性也大
Because the fat man's mass is large, his inertia is also large
因为撞胖子的需要做更多的功
Because it takes more work to knock fat man
因为撞胖子时动量变化率小
Because the rate of change of momentum when knocking fat man is small
吊着货物的起重机，当货物________________时，起重机纲缆的张力是最大的。
When the cargo is crane, the tension of the crane cable is the largest when the cargo is ________________.
停在空中不动
stationary
等速下降
moving down with uniform speed
加速下降
moving down with acceleration
减速下降
moving down with deceleration
作用在物体的合力为零，物体可能
When the resultant force acting on a body is zero. The body may
I. 静止 Stay at rest
II. 匀速运动 Moving with constant speed
III. 匀加速运动 Moving with constant acceleration
I
II
I, II
I, III
