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  1. The mass of a lift is 2000kg. When the tension in the supporting cable is 28000N, then its acceleration is
  2. The core of a transformer is laminated because
  3. The electric resistance of a certain wire of iron is R. If its length and radius
  4. The potential energy of a weightless spring compressed by a distance D is proportional
  5. The ‘rad’ is the correct unit used to report the measurement of