Physics-
General
Easy
Question
An ideal spring with spring-constant K is hung from the ceiling and a block of mass M is attached to its lower end. The mass is released with the spring initially unstretched. Then the maximum extension in the spring is
- 4 Mg/K
- 2 Mg/K
- Mg/K
- Mg/2K
The correct answer is: 2 Mg/K
Let x be the maximum extension of the spring. From energy conservation
Loss in gravitational potential energy
= Gain in potential energy of spring
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