What is a projectile? What is trajectory?
A projectile is an object that, after being launched, moves under the influence of gravity alone, following a curved path called a trajectory. Its motion is influenced by its initial velocity and the gravitational force acting on it.
What will be the change in the formula when friction gets removed?
We will remove friction i.e. e which is negative from the formula:
![\[ mgh = \frac{7}{10}mu^2 + e \]](/wp-content/ql-cache/quicklatex.com-58a14c05b31a4de4c41f606164ba721a_l3.png "Rendered by QuickLaTeX.com")