A gun of mass M fires a shell of mass m and recoils horizontally.
If the shell travels with speed v relative to the barrel,
find the speed with which the barrel begins to recoil if
(a) the barrel is horizontal
(b) the barrel is inclined at an angle A to the horizontal.
hello everyone! I want to know how to verify cos sin tan
I always feel confused when i am doing the physics exercises.
are we always use cos when it is x-axis and use sin when it is y-axis??
I feel so confused.