Question

A body is projected with a velocity of 120 ms at an angle of 30° with the horizontal. Its velocity
after 6 sec is (g = 10ms-2)​

Answer 1

Answer

• Velocity after 6 s is 0 m/s

Given

• A body is projected with a velocity of 120 ms at an angle of 30° with the horizontal [ g = 10 m/s² ]

To Find

• velocity  after 6 sec

Concept Used

$\bigstar \bf \;\; V_x=V.cos\ \theta\\\\\bigstar \bf \;\; V_y=V.sin\ \theta$

Solution

Initial vertical component :

$\rm V_y=u.sin\ \theta=u.sin\ 30= \dfrac{u}{2}=\dfrac{120}{2}=60\ m/s$

Velocity after 6 sec :

$\rm V=V_y-gt\\\\\implies \rm V=60-(10)6\\\\\implies \rm V=60-60\\\\\implies \rm V=0\ m/s$