All you have to do is add all the forces. For example if you are pushing a block with a force of 5N to the right and pushing it to the left with a force of 3N the answer would be 2N to the right.
True
You don't, if there's only one force involved. When there are two or more, then the net force is the result of the strength and direction of each one.For example, if I push a shopping cart forward and you push it backward with exactly the same force, the net force is zero and the cart doesn't start moving.
Net Force, Or Net Resultant Force, or Resultant force
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I'd call it the resultant, but "net force" is a good name too.
It's mass and the net force acting on it
This would be known as the net-force.
-- the object's mass -- the net force acting on it
True
You don't, if there's only one force involved. When there are two or more, then the net force is the result of the strength and direction of each one.For example, if I push a shopping cart forward and you push it backward with exactly the same force, the net force is zero and the cart doesn't start moving.
By adding a positive force to a negative force and determining which side has a greater strength will determine the net force.
Inertia will not be affected when "net" or "net force" is zero.
Net Force, Or Net Resultant Force, or Resultant force
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I'd call it the resultant, but "net force" is a good name too.
Net force and interference are related because net force is a force and interference is putting a force on something.