Question

A projectile 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. $ucos\theta$
• B. $u$
• C. $usin\theta$
• D. $(ucos\theta -u)$

Answer 1

The correct option is C

$usin\theta$

Since horizontal component of velocity remain always constant therefore only vertical component of velocity changes.

Initially vertical component $usin\theta$

Finally it becomes zero. So change in velocity $=usin\theta$