Turhan said:Homework Statement
A 60 kg farmer ropes a 300 kg ox. Both are initially at rest, 24 m apart on a frictionless level surface. When farmer ends up pulling the ox towards him, the ox will move
A) 4m, B) 5m, C) 12m, D) 20m, E) 24m .
Can anyone help me solve this?
Homework Equations
The Attempt at a Solution
How am I supposed to find the velocity? This is question from a previous regional olympiad phase.PeroK said:In my opinion, this is one of these silly questions that makes no real sense. You have to know what practical elements the questioner intends you to ignore and what elements to focus on. Physics is supposed to model the real world, but an absurd question like this blatantly ignores the practical realities.
Anyway, you are supposed to concentrate on conservation of momentum. But, once something has momentum on a frictionless surface, it's not going to stop. So, you are supposed to assume that the farmer and ox move very slowly and bump into each other and stop. So, the question is asking how far the ox has moved when they bump into each other.
Turhan said:How am I supposed to find the velocity? This is question from a previous regional olympiad phase.
The speed does not matter for the answer, though I suspect it would matter to the farmer.PeroK said:you are supposed to assume that the farmer and ox move very slowly
Write out the momentum conservation equation, and think of it as a differential equation.Turhan said:How am I supposed to find the velocity
A frictionless surface is a surface that has no resistance or friction when an object moves across it. This means that there is no force acting against the direction of motion, allowing objects to move smoothly and without slowing down.
A frictionless surface works by having an extremely smooth and flat surface, usually made of a low-friction material such as Teflon or ice. This eliminates any microscopic imperfections that could cause friction, allowing objects to slide across the surface with minimal resistance.
In theory, a frictionless surface is possible, but it is difficult to achieve in real life. Even surfaces that are considered to have low friction, such as ice or Teflon, still have some degree of friction. However, with advancements in technology and materials, scientists are constantly working towards creating surfaces with even lower friction.
A frictionless surface has many potential benefits, including reducing energy consumption in machinery and transportation, improving the efficiency of sports equipment, and reducing wear and tear on surfaces and objects that come into contact with each other.
While a frictionless surface can have many benefits, there are also potential drawbacks. For example, in some situations, friction is necessary for stability and control. Additionally, a completely frictionless surface would also make it difficult for objects to stay in place, as they would continually slide and slip around.