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help ...please...thanks ...>>>>>>A 12 N horizontal force F pushes a block weighing 5.0 N against a vertical wall. The coefficient of static friction between the wall and the block is 0.60, and the coefficient of kinetic friction is 0.40. Assume that the block is not moving initially. (a) will the block move? (b) in unit-vector notation, what is the force on the block from the wall?

Respuesta :

syed514

Friction is donated by F

f=μR

12N force is used to push block into the wall 
R=12N

μ=0.6
Putting values we get
f=0.6×12

To maintain the static condition of block the friction must be equal to weight.So, if 
f=mg
Then the block does not move


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