According to Newton's Second Law, F=ma, an object accelerates in the direction of a force, and the acceleration depends on the magnitude of the force and the mass of the object being acted upon. In other words, an object will accelerate in the direction of the net force.
If the forces on an object are balanced then the object will not move. This simply means that the forces on the object counteract each other. If they are unbalanced then the object will move under the effect of the resultant force. The resultant force is the combination of all of the forces acting on an object.
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.
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.
coz if they werent, whatever they were acting on, would either stay sill, or move at a constant speed
That's a true statement. Did you have a question ?
If a system is under balanced system of forces its true that it would not have any translation motion but the body can still rotate since torque can still be unbalanced even if the net force add up to zero.
No, objects under the influence of gravity have a mass.
"Balanced forces" doesn't mean that an object doesn't move. "Balanced forces" means that the vector sum of forces on an object is zero. Now, according to Newton's First Law, if no force is acting on an object, if that object is at rest it will continue being at rest; if it is moving, it will continue moving with the same velocity. In other words, there will be no CHANGE in velocity; that doesn't mean that the velocity must necessarily be zero.
free fall
Unbalanced forces are important in order to move anything. An object under balanced forces does not move. For example as you sit in your chair reading this, gravity is exerting a force on your body downwards but your chair balances this force by exerting a force upwards on you that is equal and opposite to the force of gravity. These two forces oppose each other and therefore you do not move. In tennis in order to change the direction of a tennis ball you need to exert a net force(an unbalanced force) in the direction you want the tennis ball to move. In tennis there are also unbalanced torques(a force acting at a distance from a pivot point) on the ball that cause the ball to spin. Hope that helps.
If no other forces (such as friction) act on an object, or if friction is insignificant (such as, when a heavy object just begins to fall), the acceleration is 9.8 meters per second square. This means that every second, the speed will increase by 9.8 meters per second.
If all of the forces on an object are balanced, then their net effect on the object is the same as if there were no force on it at all. Under those circumstances, its acceleration is zero, meaning that its speed and direction of motion do not change.