A `2kg` block hangs without vibrating at the bottom end of a spring with a force constant of `400 N//m`. The top end of the spring is attached to the ceiling of an elevator car. The car is rising with an upward acceleration of `5 m//s^(2)` when the acceleration suddenly ceases at time `t = 0` and the car moves upward with constant speed `(g = 10 m//s^(2))` What is the angular frequencyof the block after the acceleration ceases ?A. `10sqrt(2)rad//s`B. `20 rad//s`C. `20 sqrt(2) rad//s`D. `32rad//s`

A `2kg` block hangs without vibrating at the bottom end of a spring wi

1.	A `2kg` block hangs without vibrating at the bottom end of a spring with a force constant of `400 N//m`. The top end of the spring is attached to the ceiling of an elevator car. The car is rising with an upward acceleration of `5 m//s^(2)` when the acceleration suddenly ceases at time `t = 0` and the car moves upward with constant speed `(g = 10 m//s^(2))` What is the angular frequencyof the block after the acceleration ceases ?A. `10sqrt(2)rad//s`B. `20 rad//s`C. `20 sqrt(2) rad//s`D. `32rad//s`
Answer» Correct Answer - A `omega = sqrt((k)/(m)) = sqrt((400)/(2)) = 10 sqrt(2) rad//s`

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