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 .
What do you think?
The dilemma of Frictionless Surface
- Abdul Muntakim Rafi
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- nafistiham
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Re: The dilemma of Frictionless Surface
i think it is $24$m
\[\sum_{k=0}^{n-1}e^{\frac{2 \pi i k}{n}}=0\]
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Re: The dilemma of Frictionless Surface
Since there is no friction, there will be equal and opposite forces on the ox and the farmer. So they will move towards each other and collide. Their acceleration will be force/mass. Since you know the acceleration of both (and that they were at rest at the beginning) you can use S.S.C. Newtonian physics to find at what distance they will collide.
- Abdul Muntakim Rafi
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Re: The dilemma of Frictionless Surface
they will collide in the center of mass of their system as there is no external force.
Re: The dilemma of Frictionless Surface
Very nice solutionraihan khan wrote:they will collide in the center of mass of their system as there is no external force.