Moment of Inertia: Constant Velocity in Space Without Friction

AI Thread Summary
An object in space can maintain a constant velocity if no external forces act upon it, in accordance with Newton's first law of motion. While gravity from celestial bodies exists, the discussion focuses on the theoretical scenario where all external forces are ignored. The term "moment of inertia" is clarified as pertaining to rotational motion, not applicable to this linear motion context. To achieve constant velocity, a force must be applied initially, but once the force ceases, the object will continue at that velocity indefinitely. Thus, the key takeaway is that without external forces, an object will not accelerate or decelerate, maintaining its velocity.
rajeshmarndi
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can an object be released in space where there is no friction, to travel with a constant velocity as an force will always produce an acceleration.

as moment of inertia says if an object is flying with an velocity say 20m/s, it will continue to do so unless external force is applied.
 
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In theory, if there is no external force, it will travel at constant velocity. In practice there will always be gravity from all the objects (stars, planets, etc.) that are in space.
 
The word "inertia" applies to this question. The term "moment of inertia" is something different, related to rotational motion, not linear motion.
 
what i want to ask is that in theory if a particle is applied force, it will always travel with constant acceleration proportional to the applied force.
So what has to be done to make an object travel with constant velocity in space ignoring other existing forces or gravity.
 
If an object is moving with a given velocity and no forces are applied, it will keep moving at that velocity (Newton's first law).
 
my question is how one can make an object to fly with a constant velocity, bcoz to make an object move, an force is necessary and a force will always make an object to either accelerate or deaccelerate.
 
rajeshmarndi said:
my question is how one can make an object to fly with a constant velocity, bcoz to make an object move, an force is necessary and a force will always make an object to either accelerate or deaccelerate.

I think mathman answered that precisely. Do you agree?
 
rajeshmarndi said:
my question is how one can make an object to fly with a constant velocity, bcoz to make an object move, an force is necessary and a force will always make an object to either accelerate or deaccelerate.

The object keeps accelerating as long as force is applied. You stop applying force, the object will keep moving at constant velocity.
 

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