MHT CET202416 May 2024Evening ShiftPhysicsWork, Power and EnergyActual
The bob of a pendulum of length ' l ' is pulled aside from its equilibrium position through an angle ' ' and then released. The bob will then pass through its equilibrium position with speed ' v ', where ' v ' equal to ( g= acceleration due to gravity)
Options
- A2 g l(1- )
- B2 g l(1+ )
- C2 g l(1- )
- D2 ~g l(1+ )
Correct answer
A. 2 g l(1- )
Step-by-step solution
When bob of a pendulum rises up a height ' h ' potential energy at extreme position becomes kinetic energy of mean position. array ll & mgh = 1 2 mv _ ^2 & v _ = 2 gh & l= h +l & ~h =l(1- ) & v _ = 2 gl (1- ) array