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Q: A mobile was dropped from a balcony if the mass of the mobile phone is 0.5kg and the mobile phone was dropped from a height of 100m, g=10m/s². So what is the potential energy of mobile phone?
  • A. 5000J
  • B. 5 J
  • C. 50 J
  • D. 500 J
Correct Answer: Option D - Potential energy = m×g×h Here, m = 0.5kg, h = 100m and g = 10 m/s² = 0.5 × 100 × 10 = 500 J
D. Potential energy = m×g×h Here, m = 0.5kg, h = 100m and g = 10 m/s² = 0.5 × 100 × 10 = 500 J

Explanations:

Potential energy = m×g×h Here, m = 0.5kg, h = 100m and g = 10 m/s² = 0.5 × 100 × 10 = 500 J