Example 11.6 - Chapter 11 Class 9 - Work and Energy (Term 2)
Last updated at June 8, 2019 by Teachoo
Last updated at June 8, 2019 by Teachoo
Transcript
Example 11.6 An object of mass 12 kg is at a certain height above the ground. If the potential energy of the object is 480 J, find the height at which the object is with respect to the ground. Given, g = 10 m s–2. Given Mass of the object = m = 12 kg Acceleration due to gravity = g = 10 m/s2 Potential energy = 480 J We need to find height (h) We know that Potential energy = m × g × h 480 = 12 × 10 × h h = 480/(12 ×10) h = 48/12 h = 4 m The object is at 4 m height
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