甚麼是unbalanced force？
還有，A constant unbalanced force is needed to keep an object moving with uniform velocity是true/false?
2006-12-08 17:06:13 · 2 個解答 · 發問者 Sken 3 in 科學 ➔ 其他：科學
An unbalanced force means that the net force (or resultant force) acting on an object IS NOT ZERO.
2006-12-08 19:45:20 · answer #1 · answered by 天同 7 · 0⤊ 0⤋
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.
2006-12-08 17:29:17 · answer #2 · answered by ANDY 6 · 0⤊ 0⤋