The situation :
A block of mass $M$ is tied to a string and is spun around in a vertical circle.
The question asks me to calculate the tension in the string 'at the lowest point' after giving some values.
In the problem, when the body is in the lowest point, shouldn't the tension be $Mg$ only?
It is told that perpendicular forces are independent of each other, then why/why not the velocity of the mass be included in this scope of calculating the tension in the wire?