Define net force. Give an example from daily life where net force is zero.
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Net force is the total force acting on a body.
When a book is kept on a table the net force is zero by Newton's third law
because the force applied by book on table is equal to force applied by table on book.
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Net force is the vector sum of forces acting on a particle or body. The net force is a single force that replaces the effect of the original forces on the particle's motion. It gives the particle the same acceleration as all those actual forces together as described by the Newton's second law of motion.
One example would be you throw a ball upward, the moment just before it falls, the net force would be zero. At this moment, the gravitational force will be just equal to the force of throwing.
One example would be you throw a ball upward, the moment just before it falls, the net force would be zero. At this moment, the gravitational force will be just equal to the force of throwing.
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