Engineering Board Exam Reviewer · Thermodynamics · medium
A body of mass 10 kg is raised vertically by 50 m. What is the increase in its potential energy? (g = 9.81 m/s2)
- 4.905 kJ
- 0.5 kJ
- 49.05 kJ
- 490.5 kJ
Answer
A. 4.905 kJ
Solution
PE = mgh = 10(9.81)(50) = 4905 J = 4.905 kJ.
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