A 1,005 kg grand piano was hoisted up onto a 10th floor room in a building. When the string is 10 m, the string got stuck and the piano started dangling. The gravity of earth is 9.8 m/s Calculate the period of the dangling piano.

(Question 111) Answer step to step the following question: A bottle floating with the neck up in a bucket having water, as in the figure below. In the equilibrium position it is submerged with a depth of d0, starting from the surface water level. Show that, if it is pushed to a depth d then released, it will perform an simple harmonic movement and determine its frequency of oscillation. If d0 = 20 cm, what is the period of the oscillations? Justify your answer.

For a conical pendulum, does the string tension cause the hanging mass to accelerate? Please explain.