henryvenanilbermil
1.There are four forces acting on this block: downward gravitational force, the force from the push, a frictional force, and a normal force from the wall
henryvenanilbermil
2.Normal force is the force that the table pushes onto the block. If the force on the block from gravity is pushing the block downward, then the normal force has to push straight upward to keep the block at rest.
henryvenanilbermil
3.It's just the gravitational force and the frictional force. Yes, the magnitude of the frictional force must be equal to the weight. The friction is in the vertical direction because it is parallel to the wall (which is vertical).
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number1 6
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