If two similar springs each of spring constant K 1 are joined in series, the new spring constant and time…

If two similar springs each of spring constant K1 are joined in series, the new spring constant and time period would be changed by a factor:
  1. 12,22
  2. 14,2
  3. 14,22
  4. 12,2

Solution

1keq=1k1+1k2

1keq=1k+1k⇒keq=k2

k'=k2

T=2πMk

T'=2πMk'

⇒T'=2πMk×2

T'=2T

Asked in: JEE Main 2021 (26 Feb Shift 1)

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