NEET2009PhysicsWork, Power and EnergyActual
A block of mass M is attached to the lower end of a vertical spring. The spring is hung from a ceiling and has force constant value k . The mass is released from rest with the spring initially unstretched. The maximum extension produced in the length of the spring will be
Options
- AM g / k
- B2 Mg / k
- C4 Mg / k
- DM g / 2 k
Correct answer
B. 2 Mg / k
Step-by-step solution
Key Idea Use the law of conservation of energy. Let x be the extension in the spring. Applying conservation of energy array ll & mgx - 1 2 kx ^2=0-0 & x = 2 mg k array