The impulse imparted to the shells equals the change in the momentum:
Fav*(Delta t)= Delta m*v.
The mass change is
Delta m= n*m= (89.9shells)*(88.7g)=7.97Kg
So the average force is
F=((v)*(Delta m))/t= ((929)*(7.97))/4.84=1529.78 N
Since the velocity of the shells is much greater than the velocity of the helicopter, there is no need to use relative velocity.
Answer:B
Explanation:
I’m doing the same thing you are!
The reason the efficiency is always less than 100% is because there is always some sort of friction in the machine.
Answer: because of friction
I think it is maria but i am more sure than wondering
Work done = M x g x h
M = Mass of the body in Kg
g = Acceleration due to gravity
h - height of displacement
Work done = (M x g) x h
= 50 N x 1.5 m
= 75 J
