Question

Question No. 6
The maximum range of a gun on horizontal terrain is 4 km. If g = 10 m/s?, then the muzzle velocity of shell is
20 m/s
200 m/s
2000 m/s
400 m/s​

Answer 1

Answer:

400m/s

Explanation:

Ro=maximum range.

Vo=velocity.

range maximum when sin2(theta)=1.

Given:

Ro=4km=4000m.

g=10m/s

To find:

Vo.

Ro=Vo^2/g

4000=Vo^2/10

4000*10=Vo^2

40000=Vo^2

Vo=400m/s.