The largest grand piano in the world is really grand. Built in London, it has a mass of 1.25 ⋅ 103 kg. Suppose a pianist finishes playing this piano and pushes herself from the piano so that she rolls backwards with a speed of 1.4 m/s. Meanwhile, the piano rolls forward so that in 4.0 s it travels 24 cm at constant velocity. Assuming the stool that the pianist is sitting on has a negligible mass, what is the pianist’s mass?
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The Walking Piano, also called the Big Piano by its creator, Remo Saraceni, is an oversized synthesizer. Merging dance, music, and play, it is played by the user's feet tapping the keys to make music.
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