Answer:
Explanation:
Newton's first law states that an object will not change its motion unless acted on by an unbalanced force.
If an object was acted on by a balanced force, these forces cancel out resulting in a net force of 0 newtons, which doesn't change anything for the object.
For example: A balanced force acts on a box. One man pushes the box with a force of 5 N to the right. Another man is on the other side pushing with 5 N to the left. Calculating the net force, (5-5=0) you get that the net force is 0 N. Because the net force is 0, this situation is a balanced force. Basically, the force cancels out leaving no force to act on the object, so the motion is not changed.
However, an unbalanced force results in a change to an object's motion. For example, if there was only one man pushing the box 5N to the right, the total net force would be 5 N to the right (5-0=5). Which mean the man pushing does not get cancelled out and actually affects the box by pushing it to the right by 5N.
Hope that clarifies things a little.
Answer:
we will first consider a physics book at rest on a tabletop. There are two forces acting upon the book. One force - the Earth's gravitational pull - exerts a downward force. The other force - the push of the table on the book (sometimes referred to as a normal force) - pushes upward on the book.
