甚麼是unbalanced force？
還有，A constant unbalanced force is needed to keep an object moving with uniform velocity是true/false?
甚麼是unbalanced force？
2006-12-09 6:06 am
回答 (2)
2006-12-09 8:45 am
✔ 最佳答案
An unbalanced force means that the net force (or resultant force) acting on an object IS NOT ZERO.
2006-12-09 6:29 am
unbalanced force即是resultant force, 或者net force.
A constant unbalanced force is needed to keep an object moving with uniform velocity. --- FALSE
因為unbalanced force只會令物件有加速度(acceleration)或減速度(deceleration). 當物件靜止或者以均速(uniform velocity)運行, 它所受的力的總和應是零.
2006-12-08 22:30:29 補充：
If the force is balanced, the net force or the resultant force acting on the object is zero.
A constant unbalanced force is needed to keep an object moving with uniform velocity. --- FALSE
因為unbalanced force只會令物件有加速度(acceleration)或減速度(deceleration). 當物件靜止或者以均速(uniform velocity)運行, 它所受的力的總和應是零.
2006-12-08 22:30:29 補充：
If the force is balanced, the net force or the resultant force acting on the object is zero.
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https://hk.answers.yahoo.com/question/index?qid=20061208000051KK04564