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Two Masses One on Table, One Hanging

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



A block of mass1 5.0 kg is on a table that bonds a coefficient of friction of 3.00. Mass1 is attached to Mass2 by a string, and Mass2 is hanging over the table. The system is released from rest for it to accelerate.

Homework Equations



F=ma
F fric = μFnormal

The Attempt at a Solution



[itex]\sum Fx of Mass1[/itex] = F tension - F friction

[itex]\sum Fy of Mass1[/itex] = 0

[itex]\sum Fx of Mass2[/itex] = 0

[itex]\sum Fy of Mass2[/itex] = FW - F tension

Is tension created by the mass1 or mass2?
im guessing both? but that doesn't make any sense...
 

Answers and Replies

  • #2
1,065
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1. Where is m3?
2. Is coefficient of friction of 3.00 is between the block and table?
 
  • #3
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1. Where is m3?
2. Is coefficient of friction of 3.00 is between the block and table?
no m3.....

2. yes
 
  • #4
1,065
10
ok wrong interpretation.

Find net force on each block.
Both will accelerate at equal rate for the string is massless and inextensible.
 
Last edited:
  • #5
44
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oops one on table, one hanging
 
  • #6
1,065
10
Use Newton's 3rd law.
The hanging block will pull the block on the table.
The block on the table will pull the hanging block with equal force.
 

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