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The weight of the fluid displaced has to equal the object's weight for the object to float. If there is not a balance between these two forces then the object will sink.

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Q: For an object to sink in a fluid there must be an unbalanced force?
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What will an object always do when acted on by an unbalanced force?

There's no such thing as "an unbalanced force". But when the entire group of forceson an object is unbalanced, then the object must accelerate.


How does an unbalanced force affect a moving object at a constant velocity?

If the group of forces on an object is unbalanced, then the object can't have constant velocity. Its speed or the direction of its motion must change.


Why there must be an unbalanced force acting if an object is moving in a circle at constant speed?

If an unbalanced force was not acting upon it, it wouldn't be moving in a circle.An object with no unbalanced force will either not be moving, or be moving in a straight line due to Isaac Newtons 1st law of motion.


What is an unbalned force?

An unbalanced force is a force that causes change in motion. A force must also overcome friction before an object will move.


What happens to the motion of an object when an unbalanced force acts on it?

The object accelerates in the direction that the greater force is pushing or pulling it.any object is acted upon by an unbalanced force will make the object move with the unbalanced force as there is not the right amount of the other force to stop it.if they were balanced forces the object would find equilibrium and would end up basically being held in one place, or travel on one vector without changing course.As for an object under the effect of unbalanced forces? It would NOT behave like the one described above. that is all that could be said.The object accelerates in the direction of the 'net' force ... the vector sum of allof the individual forces. The rate of acceleration is proportional to the magnitudeof the net force.It (the motion) is changed.(Your last it being the object ... I hope).when an unbalanced force act on a moving object, the velocity of the object will change.When an unbalanced force acts on an object, the object will accelerate. This is a fundamental law of physics that goes back to Newton. Further, the object will move in the direction of the unbalanced force.We know that force is equal to mass times acceleration (F = m x a). If force is applied, the object is accelerated in the direction that the force moves it. If force increases, the object will accelerate more because acceleration must also increase.There's no such thing as "an unbalanced force".When the group of forces acting on an object is unbalanced, then the objectaccelerates, in the direction of the vector sum of the forces.


What always happens to the motion of an object when unbalanced forces act on it?

There's no such thing as "an unbalanced force".When the group of forces acting on an object is unbalanced, then the objectaccelerates, in the direction of the vector sum of the forces.


How do unbalanced forces affect motion?

-- An unbalanced group of forces on an object causes the object to accelerate in the direction of the net force. -- If an object is not moving, then the group of forces on it must be balanced, else it would be accelerated.


What type of force accelerates an object?

It depends what the situation is. If an object is falling, the weight of the object, which is determined by the object's mass and the gravity, is the force causing it to accelerate. If you're talking about a box being pushed, you could have a person pushing it, which causes it to accelerate, but you also must take into account the force of friction combatting the applied force.


Can Balanced forces acting on an object will cause it to change its motion?

No. To change an object's velocity, you need an unbalanced force, i.e., the sum of forces must be non-zero.


Is an unbalanced force needed to start motion?

Yes, in order for an object to accelerate or decelerate, the resultant force cannot be zero.To cause a car to accelerate, the forward force (thrust force/engine force) must be greater than the backwards force (friction force/brake force). When this unbalanced force is achieved, the body will initiate its motion.


For motion to occur?

An unbalanced force must be exerted .


How will you know whether the given applied force on an object is balanced or unbalanced?

You must firstly know it's physical details and it's conditions (The objects'). If you apply a balanced wave of force it will maintain those physical details and conditions but if you apply an unbalanced wave to the object it will suffer from maintaining it's physical details and conditions. Also when the object is not moving or when the object is moving at a constant velocity and if at it's moving it doesn't have any changing velocity (Acceleration) it will mean the applied force is balanced. Other than this, is unbalanced.