Question

If forces acting on an object are unbalanced, which factors may result from an unbalanced force? Check all that apply. The net force is negative.  The net force is zero.  The net force is positive.  There is a change in motion.  There is no change in motion.

Answer 1

When forces acting on an object are unbalanced, the net force is non-zero and results in a change in motion, corroborated by Newton's second law, Fnet = ma.

Step-by-step explanation:

When forces acting on an object are unbalanced, several factors can result:

• The net force is neither necessarily negative nor positive; it is simply non-zero.
• There is a change in motion, which could mean a change in the object's speed or direction, or the initiation of movement if the object was initially at rest.

The concept of net force being negative or positive is misleading; the net force is a vector quantity and it can have any value that is not zero when unbalanced forces are present. The correct understanding is that a net force acting on an object is equal to the rate of change of the object's momentum (Newton's second law), signified by the equation Fnet = ma (where m is mass and a is acceleration). Consequently, if the net force is nonzero, the movement or velocity of the object will change.

By applying Newton's second law of motion, we can disregard internal forces such as those holding a body together, focusing instead on external forces to determine the net force and subsequent motion or acceleration of the object. An example of this could be a push or pull that causes an object to start moving, speed up, slow down, or change direction.

Answer 2

Answer: The net force is negative, The net force is positive, There is change in motion.

When an balanced force acts, there is change in motion. In case of balanced forces, the object does not change its motion. The unbalanced force causes change in the momentum of the object. There would be some net force. It would not be zero. The net force is zero when the acting forces are balanced. The net force in case of unbalanced forces have certain magnitude and are positive or negative depending on the direction. The positive and negative sign denotes direction of the net force.