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PhysicsJEE/NEETLaws of Motion: the misconceptions that cost marks
5 wrong ideas students commonly carry in Laws of Motion. Each page has a one-question check and a careful explanation of what's actually true.
- Does a moving object need a force to keep moving?Myth: A moving object needs a constant force to keep moving.
- If action and reaction are equal and opposite, how does anything move?Myth: Action and reaction forces cancel each other, so nothing can move.
- Is the normal force always equal to mg?Myth: The normal force always equals mg.
- Does friction always oppose motion?Myth: Friction always opposes the motion of the object.
- Is centrifugal force real in circular motion?Myth: In circular motion there is an outward centrifugal force acting on the body (ground frame).