如果一個object 有個10 ms^-1 的constant velocity
另一個有 1000ms^-1的constant velocity
他們一起撞在一個wall
因為他們的acceleration 都是零, 佢地既force 係咪都係0?
thx
Force and velocity 10分
2007-10-16 6:54 am
回答 (2)
2007-10-16 7:10 am
✔ 最佳答案
force唔係0當你衝緊去果陣冇+速度
但當撞上左牆果0.01秒你個物件會減速
果度就係個a啦
咁就會有一個同衝過去果陣既相反方向既力
參考: 係掛....唔肯定....呢課d野都唔多記得嚕- -"
2007-10-16 7:12 am
If you ask for NET force,
By F=ma
F= m (0)
Net Force = 0 N
But only use the information you have given is not enough for finding other force.
You can draw a free body diagram,
although the net force is zero,
there is also gravitational force w=mg;
there might be also a normal reaction if something is holding it;
or there might be air resistance or other frictional force.
This is what I know
Hope can help you
By F=ma
F= m (0)
Net Force = 0 N
But only use the information you have given is not enough for finding other force.
You can draw a free body diagram,
although the net force is zero,
there is also gravitational force w=mg;
there might be also a normal reaction if something is holding it;
or there might be air resistance or other frictional force.
This is what I know
Hope can help you
收錄日期: 2021-04-23 19:56:59
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