1.

Arrive at the expression for time period of oscillation of a mass attached to avertical spring.

Answer»

Solution :Consider a spring of force constant K. Let a MASS body .m. be at ONE end of the massless spring. Let the other end of the spring be supported vertically.
Force `=-kx=ma`
hence`""ma+kx =0`
`"i.e."m(d^(2)x)/(dt^(2))+kx=0`
`"or"(d^(2)x)/(dt^(2))+((k)/(m))x=0`
Compaaring (1) with a standard diffential equation `(d^(2)x)/(dt^(2))+omega^(2)x=0`representing S.H.M we write
angular frequency `omega^(2)=(k)/(m)`
or `omega=sqrt((k)/(m)) or (2pi)/(T)=sqrt((k)/(m))`
`therefore"period of OSCILLATION T"=2pisqrt((m)/(k))`.
where, `k-`is the spring constant.


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