An object of 10 kg is raised through a height of 2 m. The work done is (g = 9.8 m/s2)

  1. 196 J
  2. 98 J
  3. 19.6 J
  4. 4.9 J

Answer (Detailed Solution Below)

Option 1 : 196 J
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Detailed Solution

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Concept:

Work is said to be done by a force when it moves its point of application through a distance.

Work done = Force × Distance moved

SI unit of work is joule. 1 J = 1 N.m

Calculation:

Force = mg = 10 × 9.8 = 98 N

Distance = 2 m

Work done = Force × Distance = 98 × 2 

W = 196 J

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