Question

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?

• A. $u\cos \theta$
• B. $u$
• C. $u\sin \theta$
• D. $\left(u\cos \theta -u\right)$

Answer 1

The correct option is C $u\sin \theta$

Change in speed is=$\Delta \mu$

$\Delta \mu =\mu -\mu \cos \varnothing$

Change in velocity

$\begin{array}{c}\Delta \mu =\mu -v=\mu \cos \varnothing \hat{i}-\left(\mu \cos \varnothing i-\mu \sin \varnothing \hat{j}\right)\\ \Delta \mu =\mu \sin \varnothing \end{array}$