A stone of mass m at the end of a string of length l is whirled in a vertical circle at a constant speed. The tension in the string will be maximum when the stone is

As the transition from laminar to turbulent flow is induced in a cross flow past a circular cylinder the value of the drag coefficient drops.

For a fluid element in a two dimensional flow field ($$x-y$$ plane), it will undergo

Bernoulli’s equation can be applied between any two points on a stream line for a rotational flow field.