Question

A projectile of mass $0.5kg$ is thrown with a velocity of $30m/s$ at an angle of ${60}^0$ with the horizontal. Find its momentum at highest point.

• A. $7.5N-s$
• B. $9N-s$
• C. $5.5N-s$
• D. $12N-s$

Answer 1

The correct option is A $7.5N-s$

At the highest point y-component of velocity becomes $0$

So, the x-component of velocity is the net velocity.

Finding x-component of velocity
$ucos\theta =30cos60^0=15m/s$.

So, the velocity at the highest point is $15m/s$.

Hence $p=m\times v$
$p=0.5\times 15=7.5N-s$