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Q: An object of 5 kg is raised to a height of 4 m. What will be the value of the work done due to the force of gravity on that object? (g = 10m/s² )
  • A. 200J
  • B. 20J
  • C. -20J
  • D. -200J
Correct Answer: Option D - Work done is given by the equation, W = – mgh where m = mass = 5 kg g = acceleration due to gravity = 10 m/s² h = height = 4 m Hence, work done = –5 x 10 x 4= – 200 Joule
D. Work done is given by the equation, W = – mgh where m = mass = 5 kg g = acceleration due to gravity = 10 m/s² h = height = 4 m Hence, work done = –5 x 10 x 4= – 200 Joule

Explanations:

Work done is given by the equation, W = – mgh where m = mass = 5 kg g = acceleration due to gravity = 10 m/s² h = height = 4 m Hence, work done = –5 x 10 x 4= – 200 Joule