question_answer

A gun mounted on the top of a moving truck is aimed in the backward direction at an angle of \[30{}^\circ \] to the vertical. If the muzzle velocity of the gun is 4 m/s. the value of the speed of the truck that will make the bullet come out vertically is:

A)  1 m/s                                   

B)  \[\frac{\sqrt{3}}{2}m/s\]

C)  0.5 m/s                               

D)  2 m/s