MHT CET 2023 Physics question
A uniform wire 20 m long and weighing 50 N vertically. The speed of thee wave at mid point of the wire is (acceleration due to gravity = g = 10 ms)
Answer: (C)
Solution
The wire hangs vertically, so the tension at the mid point equals the weight of the lower half: . Mass per unit length: for the whole wire, so .
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