1.

A concrete hoist with a mass of 4500 kg is raised vertically upward to a distance of 60 m. How muchwork is done? Take g=10 ms?. ​

Answer»

>As we KNOW energy is ALWAYS conserved

  • Hence work done is EQUALS to the potential Energy,
  • Mass = 4500 kg.
  • Displacement = 60m
  • g = 10 m/s
  • Potential Energy = ?
  • we know,

    U = mgh

    U = 4500×60×10

    U = 270000 Joules

    Therefore, the work done is 270000 Joules.

    Hope this helps you.

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