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PhysicsJEE/NEETWork, Energy & Power: the misconceptions that cost marks
5 wrong ideas students commonly carry in Work, Energy & Power. Each page has a one-question check and a careful explanation of what's actually true.
- Are you doing work when you hold a heavy bag still?Myth: Holding a heavy bag still means you are doing work on it.
- Can the work done by a force be negative?Myth: Work done by a force is always positive.
- Does the centripetal force do work in circular motion?Myth: The centripetal force does work in uniform circular motion.
- If momentum is conserved in a collision, is kinetic energy conserved too?Myth: If momentum is conserved in a collision, kinetic energy is conserved too.
- Does doubling speed double kinetic energy?Myth: Doubling speed doubles kinetic energy.