Question
A girl is swinging on a swinging plate form in sitting position when the girl stands up then the period of swinging?
Will not change
Will depend on height of girl
Will be longer
Will be shorter
Solution
D.
Will be shorter
When the girl stands up, the centre of mass gets higher which effect on point of oscillation. As a result effective length will decrease. The period of will varies with square root of the effective length, time period will decrease.
we know this equation,
