SOLUTION: 1. A 25 N object requires a 5.0 N to start moving over a horizontal surface. What is the coefficient of static friction? 2.A 12 N cart is moving on a horizontal surface with a

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Question 1040014: 1. A 25 N object requires a 5.0 N to start moving over a horizontal surface. What is the coefficient of static friction?

2.A 12 N cart is moving on a horizontal surface with a coefficient of kinetic friction of 0.20. What force of friction must be overcome to keep the object moving at a constant velocity?

Found 2 solutions by solver91311, ikleyn:
Answer by solver91311(24713)   (Show Source): You can put this solution on YOUR website!


Physics problem; Algebra website. Sort of like trying to buy a pound of 10d nails at the grocery store.

John

My calculator said it, I believe it, that settles it
Answer by ikleyn(52824)   (Show Source): You can put this solution on YOUR website!
.
1. A 25 N object requires a 5.0 N to start moving over a horizontal surface. What is the coefficient of static friction? 

 = 

Coefficient of friction is the ratio of the magnitude (modulus) of the shifting force  applied to the body 
and directed along the surface to the magnitude (modulus) of the normal force  directed normal to the surface (see this Wikipedia article).


I  our case,  =  = 0.2.

2. A 12 N cart is moving on a horizontal surface with a coefficient of kinetic friction of 0.20. What force of friction
must be overcome to keep the object moving at a constant velocity? 

 =  = 0.2*12 = 2.4 N.

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