A 1490 N crate is resting on a table connected to a 400 N block through a frictionless pulley system as shown.  Friction between the crate and the table is enough to keep the system at rest.  The arrows show the forces that act on the crate and the block.

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Q: A 1490 N crate is resting on a table connected to a 400 N block through a frictionless pulley system…

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.