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15-09-2022
Physics

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500 kg piano is being lowered to the ground with a rope. The tension on the rope is 4000 N, and the air friction acting on the piano is 500 N . When the piano passes by a window that is 30 m above the ground, the piano is moving at 2 m/s.

Draw a FBD for the piano

What is the net force on the piano?

What is the acceleration of the piano?

How long will it take the piano to reach the ground?

Answer :

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