ICSE Class 10 Answered
A compressed spring has a tennis ball of mass 0.5 kg attached to it. The spring is then released which sends the ball moving on a horizontal surface, with a sped of 2m/s-1. What is the elastic energy of the compressed spring?
Asked by khushdab | 23 Apr, 2020, 14:20: PM
When the spring is released all the potential energy stored in the compressed spring gets converted to kinetic energy.
By using principle of consvervation of energy,
Total energy = Potential energy + Kinetic energy
Thus,
P.E. = K.E.
![K. E. space equals space 1 half m v squared space
equals space 1 half cross times 0.5 space cross times open parentheses 2 close parentheses squared space
equals space 1 space J space
T h u s comma space
P. E. space equals space 1 space J](https://images.topperlearning.com/topper/tinymce/cache/7ecf34aa4d47d6a9b61d72a8575105de.png)
Thus, the elastic potential energy when spring was compressed is 1 Joule.
Answered by Shiwani Sawant | 23 Apr, 2020, 19:23: PM
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