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A mass of 150 g experiences a force of 100 N. Find the energy or work expended if the mass moves 10 cm.
1. 1000 J
2. 1 J
3. 10 J
4. 100 J

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Correct Answer - Option 3 : 10 J

CONCEPT:

 
  • Force: Force is defined as produce of mass times acceleration.
    • SI unit of force is the Force (F).

Force = mass x acceleration

  • Work:  Work is measured by the product of force and displacement of the body along the direction of the force.
    • SI unit of work is Joule (J).
  • Energy: The capacity of doing work by a body is called its energy.
    • SI unit of energy is Joule (J).

 

Calculation:

Displacement = 10 cm = 0.1 m

Force = 100 N

Energy or work = 100 × 0.1 = 10 J

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