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Q: When an object of 11 kg is at a height of 6 m from the ground, then find the energy contained in it? (g=9.8ms-²)
  • A. 539J
  • B. 646.8J
  • C. 528J
  • D. 520J
Correct Answer: Option B - Given, m = 11 kg, h = 6 m, g = 9.8 m/s² P.E. = mgh = 11 × 9.8 × 6 = 646.8 J
B. Given, m = 11 kg, h = 6 m, g = 9.8 m/s² P.E. = mgh = 11 × 9.8 × 6 = 646.8 J

Explanations:

Given, m = 11 kg, h = 6 m, g = 9.8 m/s² P.E. = mgh = 11 × 9.8 × 6 = 646.8 J