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Q.
A particle is fired with velocity u making angle $\theta$ with the horizontal. What is the change in velocity when it is at the highest point
Motion in a Plane
Solution:
$\overrightarrow{u} = u \, cos \, \theta \hat{i} + u \, sin \, \theta \hat{j}$
$\overrightarrow{\nu} = u \, cos \, \theta \hat{i}$
$\overrightarrow{\Delta \nu} = \overrightarrow{\nu} - \overrightarrow{u}$