- #1
AHashemi
- 25
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Homework Statement
We have a heavy chain with length of L and weight of m placed on a table. we take an end of it and move it with constant velocity of v upwards. so each moment it gets heavier. If the force needed for this uniform speed is called F, and length of chain which is higher than the table is called y, write F as a function of y.
Homework Equations
F=ma
y=vt
y=vt
The Attempt at a Solution
equation of chain's weight at each moment is
[tex]M=ym/L=vtm/L[/tex]
and delta M is equal to
[tex]\delta M=vm/L[/tex]
But I can't calculate the force needed to make this motion with uniform speed.