A boy aims a gun at a bird from a point, at a horizontal distance of 100 m. if the gun can impart a velocity of 500 m/sec to the bullet…

Q: A boy aims a gun at a bird from a point, at a horizontal distance of 100 m. if the gun can impart a velocity of 500 m/sec to the bullet, at what height above the bird must he aim gun in order to hit it ?

Sol. x = vt or 100 = 500 × t ; t = 0.2 sec.

Now h = 0 + (1/2) × 10 × (0.2)2

= 0.20 m = 20 cm