Q. 73.8( 5 Votes )

One person says that potential energy of a particular book kept in an almirah is 20 J and other says it is 30J . Is one of them necessarily wrong? Give reasons.

Answer :

Nobody is wrong. Potential energy of an object depend upon the consideration of zero potential energy.

If we consider ground as zero potential energy lifting a 1kg object to a height of 3m taking g=10 brings the object to 20J potential energy , whereas considering the surface at a vertical height of 1 m above ground as zero potential lifting a 1kg object to 2m makes the potential to 30J.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Conservation of Mass-Energy41 mins
Cell Organelles of Energy Metabolism49 mins
Champ Quiz | 2-Dimension( Coordinate geometry )36 mins
Matter and Its Classification34 mins
India – size and location34 mins
Rest and Motion59 mins
Cell Appendages and Transport60 mins
NCERT | Angle Sum Property44 mins
Speed and Velocity59 mins
Wren and Martin | Grammar44 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses