A shell is fired vertically from a cannon which is travelling at constant speed u=30km/hr. the projectile leaves the connon with a velocity `v_(r)=20` m/s relative to the cannon . Show that the shell will land on the vehicle at the gun location and calcu late the distance by the vehicle during the flight of shell.

Answer

s=34m

Explanation

`T=(2u)/(g)=(2xx20)/(10)=4` sec
Distance travelled by the cannon.
`s=30xx4xx(5)/(18)m`
`s=120xx(5)/(18)`
`s=(100)/(3)m`