But the water carried out of the wagon loses it's momentum when it hits the floor. The system is no longer closed and isolated.
I still can't get my hand wrapped around this problem.
Hi, thanks for replying and sorry for being rather slow in getting the point.
But why do we care about the total system? I mean, after some water spill out of the cart, they carry out momentum and the velocity of the cart must change, right? The cart is the object we are interested in, so how...
I still don't get how to solve the second question if momentum is obviously not conserved (momentum is carried out by the slipping water).
If I use dp/dt = (dm/dt) v + ma I can't have it equal to zero because there IS a change in momentum. So how do I go on from here? have the change in momentum...
Hi, first of all thank you both for the warm welcoming and helpful replies.
But how can I do that if I don't know how much momentum is being transferred? the professor said that the first case may be possible to derive using conservation of momentum [m0v0=(m0+αt)v] and integration, but not for...
Homework Statement
A long wagon with mass m0 and inital velocity v0 on a frictionless floor.
On time t=0 we open a faucet which starts dripping water in a given pace Q=Δm\Δt=α.
1. What's the speed of the wagon on time t.
2. Answer 1. if on t=0 the wagon is full of water and it's mass is M0...