Questions
A pendulum bob has a speed of 3 m/s at its lowest position. The pendulum is 0.5 m long. The speed of the bob, when the length makes an angle of to the vertical, will be (If )
detailed solution
Correct option is D
Let bob velocity be v at point B where it makes an angle of 60o with the vertical, then using conservation of mechanical energyKEA+PEA=KEB+PEB⇒12m×32=12mv2+mgl(1−cosθ)⇒9=v2+2×10×0.5×12⇒v=2m/sTalk to our academic expert!
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A simple pendulum has time period T1. The point of suspension is now moved upward according to equation where . If new time period is T2 then ratio will be
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