Equal and opposite forces. Imagine 2 people pushing a car, one at the front and one at the back. If they are both pushing with the same force, the car will not move.
Unbalanced forces result in an object's acceleration, causing it to change its speed or direction of motion. The object will continue to move in the direction of the stronger force until a balanced condition is achieved.
The force that acts on an object and causes a change in its motion is called unbalanced force. When the forces acting on an object are not in equilibrium, causing a net force in a particular direction, it can result in the object accelerating or decelerating.
Balanced forces will result in no motion or a state of equilibrium. When forces are equal and opposite in direction, they cancel each other out, resulting in no overall movement of an object.
What kind of object in what kind of motion? The question is too vague to answer, and the forces depend on the properties of the object and its environment anyway. For example, there might ... or might not ... be significant electromagnetic and/or gravitational forces acting on the object (technically, any real object in the real universe WILL have electromagnetic and gravitational forces acting on it, but they may be insignificant in some cases).
An unbalanced force acting on an object causes it to change its motion. This force can come from interactions like pushing, pulling, gravity, or friction. The change in motion can be a change in speed, direction, or both.
Unbalanced forces result in an object's acceleration, causing it to change its speed or direction of motion. The object will continue to move in the direction of the stronger force until a balanced condition is achieved.
The force that acts on an object and causes a change in its motion is called unbalanced force. When the forces acting on an object are not in equilibrium, causing a net force in a particular direction, it can result in the object accelerating or decelerating.
Balanced forces will result in no motion or a state of equilibrium. When forces are equal and opposite in direction, they cancel each other out, resulting in no overall movement of an object.
What kind of object in what kind of motion? The question is too vague to answer, and the forces depend on the properties of the object and its environment anyway. For example, there might ... or might not ... be significant electromagnetic and/or gravitational forces acting on the object (technically, any real object in the real universe WILL have electromagnetic and gravitational forces acting on it, but they may be insignificant in some cases).
Acceleration in motion refers to a change in speed or direction of that object's motion. So a type of motion in which speed and direction do not change is a motion in which the acceleration is constant (i.e. unchanging).
An unbalanced force acting on an object causes it to change its motion. This force can come from interactions like pushing, pulling, gravity, or friction. The change in motion can be a change in speed, direction, or both.
I must note that it is invalid for a force to have a "change in motion" because forces do not move, (although the point they act on can move) if you mean "causes no change in motion" then my answer is that: Fundementaly all forces cause an acseleration of the object they are acting upon unless that force that is balenced (cancled out) by another force. This is expressed by f=ma where f is the total forces acting on the object, m is the mass and a is the acseleration.
When an object's motion is changed, the cause is generally a net external force acting on the object. This force can come from interactions with other objects or fields in the environment, causing a change in the object's velocity or direction of motion.
Action-reaction forces always act on two different objects. When object A exerts a force on object B, object B exerts an equal and opposite force on object A. This is known as Newton's third law of motion.
"Constant velocity" means neither the speed nor the direction of the object's motion is changing. "Rest" is just one kind of constant velocity ... the kind with zero speed. The condition for an object's velocity to remain constant is: Either there are no forces acting on the object, or else all of the forces acting on it add up to zero. If there is any NET force acting on the object, then its velocity will change ... it will either speed up, slow down, or curve in a new direction.
A net force acting on the object causes it to change its motion. This force can be a result of pushing, pulling, gravity, friction, or other interactions with the object's environment. The object will accelerate in the direction of the net force applied to it.
If the change of position is horizontal, then there's no energy involved. If it's a vertical change, then gravitational potential energy changes.