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.
Newton's second law of motion covers this.The net force on an object accelerates the object.
If the object accelerates, that means the forces are NOT balanced.
change in velocity
The object accelerates downwards in response to the attractive force of gravity.
A hill is not a force, balanced or otherwise. According to Newton's Second Law, if there is any unbalanced force on an object, the object accelerates - its velocity changes.
When a force is applied to an object, it accelerates. for example, if you push an object, the object accelerates away from you and, eventually, will move away from you..
It accelerates as long as the force is applied, and after that it continues at a uniform speed and direction.
changes the motion of the object
When an object accelerates, the force is unbalanced.
I can say that a force is the ONLY thing that can accelerate an object.
That is called gravity.
Accelerates the motion of an object.
When an unbalanced force acts on an object, the weight of the object decreases.
Gravity is a force that accelerates the falling object towards the ground.
The object accelerates.
It accelerates.
The net force on the object is upward, so the object accelerates upward in the fluid.