Fluid Mechanics: Can't Solve Exercise 3?

[JSBeckton]

http://img90.imageshack.us/img90/9176/img062iz2.jpg

I am having trouble starting excersize 3. If both jets have the same velocity,area, and the same density what would cause the cart to move? If they are mean that the cart is given an intial velocity and I need to give an expression fot the acceleration and velocity I am thinking that the two forces would be equal and opposite and therefore cancel each other out. In that case the velocity remains constant and the acceleration is 0 due to no friction.

Can anyone tell me if there is something I am missing?

Thanks

 

[hxtasy]

Well if they are just asking for an expression for U(t) and a(t) so even if they cancel out there is still a mathematical model that it will follow.


But either way if you find the answer can you post it this is interesting?

 

[piercas]

for sharing your question and thoughts on Exercise 3. Fluid mechanics is a complex and fascinating field, and it is not uncommon for students to encounter challenges in solving problems. In this exercise, it seems that you are on the right track in thinking about the forces acting on the cart. However, it is important to consider the principles of Newton's laws of motion in this scenario. While the two jets may have the same velocity, area, and density, they may not necessarily have the same mass or momentum. This could result in an unbalanced force acting on the cart, causing it to move. Furthermore, external factors such as air resistance and friction may also play a role in the motion of the cart. I would recommend revisiting the problem and carefully considering all the forces and factors at play. You may also find it helpful to consult with a professor or classmate for further guidance. Keep up the good work in your studies of fluid mechanics!