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# The angular frequency of a spring block system is ω0 This system is suspended from the ceiling of anelevator moving downwards with a constant speed v0. The block is at rest relative to the elevator. Lift issuddenly stopped. Assuming the downwards as a positive direction, choose the wrong statement:The amplitude of the block is v0ω0The initial phase of the block is πThe equation of motion for the block is v0ω0sinω0t.The maximum speed of the block is v0.

A
The equation of motion for the block is v0ω0sinω0t.
B
The amplitude of the block is v0ω0
C
The initial phase of the block is π
D
The maximum speed of the block is v0.
Solution
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#### Since V0 is the maximum speed of the ball in its equilibrium position.∴V0=ω0AA=V0ω0So equation of motion becomes V0ω0=Asinω0t as there was no initial phase in the SHM.There was no initial phase in the SHM.Hence B is correct.

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