Question

An airplane moving with horizontal velocity V at height h above a level plane.if a projectile is fired from a gun at an instant when plane is vertically above the gun,what is the minimum initial velocity of the projectile in order to hit the plane​

Answer 1

Explanation:

Lets consider u= initial velocity

h=height

g= acceleration due to gravity

v= speed at the ground

From 3rd equation of motion,

v

2

=u

2

+2gh

v=

u

2

+2gh

v=(u

2

+2gh)

1/2

Answer 2

Answer:

Lets consider u= initial velocity

h=height

g= acceleration due to gravity

v= speed at the ground

From 3rd equation of motion,

v

2

=u

2

+2gh

v=

u

2

+2gh

v=(u

2

+2gh)

1/2

The correct option is A.