A boy is swinging on a swing such that his lowest and highest positions are at heights of 2m and 4.5m respectively. His velocity at the lowest position is,

A boy is swinging on a swing such that his lowest and highest position

1.	A boy is swinging on a swing such that his lowest and highest positions are at heights of 2m and 4.5m respectively. His velocity at the lowest position is,
Answer» `2.5 MS^(-1)` `7 ms^(-1)` `14 ms^(-1)` `20 ms^(-1)` Answer :B