Help problem with rolling

  • Thread starter costas
  • Start date
  • #1
costas
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Homework Statement



Plank of mass M = 8 kgr is installed on the same two tubes (very small
thickness) radius R and mass m = 2 kgr. Initially the system property. A horizontal
force F = 40 N applied to the board and the tubes rolled without sliding (Ic = mR^2).
When the board shifted s = 2m on the ground calculate:

a. the speed of the board
b. the acceleration of the board
c. the friction between board and the tubes
d. the friction between tubes and floor


The Attempt at a Solution



Ι have found the speed of the board but i don't know how to find the acceleration.
 

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Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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Welcome to PF!

Hi costas! Welcome to PF! :smile:
Ι have found the speed of the board but i don't know how to find the acceleration.

If you have found v as a function of s, then obviously you know how to get dv/ds, and you can then get dv/dt by using the chain rule :wink:
 

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