Ahorizontal force of 5.0 n pushes a 0.50-kg block against a vertical wall. the block is initially at rest. the frictional force is

The frictional force exerted on the block is 5 N.

Acceleration of the block

The acceleration of the block is calculated as follows;

Coefficient of kinetic friction

The coefficient of kinetic friction of the block is calculated as follows;

Frictional force

The frictional force exerted on the block is calculated as follows;

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There are 4 forces acting on the block:
- the horizontal force F=5.0 N that pushes the block against the wall
- the normal reaction N of the wall against the block, horizontal but in the opposite direction
- the friction force, equal to , pushing upwards
- the weight of the block: mg, pushing downward

If the block is in equilibrium, it means that F=N and that the friction force is equal to the weight of the block, so: