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If the sum of all forces on an object is zero, then the object remains in constant,

uniform motion.

'Constant uniform motion' means motion in a straight line at a constant speed.

The physical description of such motion is "constant velocity".

"Rest" is just constant velocity with a speed of zero.

If the sum of all forces on an object is NOT zero, then the object's velocity must

change. The change may consist of speeding up, slowing down, or turning in a

different direction.

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โˆ™ 2013-06-03 19:06:50
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Q: What are the condition of an object to stay at rest to keep moving with constant velocity or to move with incresing velocity?
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What are the condtions for an object to stay at restto keep moving at constant velocity or to move with increasing velocity?

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