How Does Tension Affect Friction Force Between m1 and the Surface?

AI Thread Summary
Tension plays a crucial role in determining the friction force between mass m1 and the surface, as it affects m1's horizontal motion. The frictional force acts horizontally to counterbalance the tension force, establishing a dynamic relationship between the two. Additionally, the vertical component of forces is derived from the free body diagram and the equation ƩF = ma. Tension influences not only m1 but also the pulley, which connects both masses, thereby linking their movements. Understanding these interactions is essential for analyzing the system's overall behavior.
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In (the partial) solution, why does it consider the Tension,T, for finding the friction force between m1 and the surface? The tension is only affecting m1 in the horizontal direction. From where, the vertical component is apperaing?
 

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from ƩF = ma and the free body diagram - the frictional force also acts horizontally to oppose the tension force so you need it.
Ultimately, it will form the link between the two masses.
 
senior said:
The tension is only affecting m1 in the horizontal direction.
Careful. The tension pulls on the pulley--which is attached to m1--in two directions.
 

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