Help I dunno how to use coefficient

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theLHC
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Help... I don't know how to use coefficient!

Homework Statement


A 20 kg mass is moving along a horizontal surface. A 150 N force is applied to it. If the coefficient of kinetic friction is 0.10, calculate
a) The force of friction
b)The net force
c)The acceleration
Draw a force diagram

The Attempt at a Solution



Well, I don't know how to calculate a-c, but I attempted to draw a force diagram of it:

Since I cannot post it, i will describe how it looks:
A block is on the surface of the floor. It has a force of 200 N pushing down on the ground, and the push of 150 N pushing the object. The resulting force is 240 N, if measured by scale diagram. Thats about as far as I got. Please help...:cry:
 

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theLHC said:

Homework Statement


A 20 kg mass is moving along a horizontal surface. A 150 N force is applied to it. If the coefficient of kinetic friction is 0.10, calculate
a) The force of friction
b)The net force
c)The acceleration
Draw a force diagram

The Attempt at a Solution



Well, I don't know how to calculate a-c, but I attempted to draw a force diagram of it:

Since I cannot post it, i will describe how it looks:
A block is on the surface of the floor. It has a force of 200 N pushing down on the ground, and the push of 150 N pushing the object. The resulting force is 240 N, if measured by scale diagram. Thats about as far as I got. Please help...:cry:

The coefficient of friction will apply to the force between the block and the surface. And this would have a relationship with the 200N downward force. But it's effect would serve to retard the 150N horizontal force.
 


well how can you put this into a summation equation?
where does the friction coefficient go into the equation?
 


theLHC said:
well how can you put this into a summation equation?
where does the friction coefficient go into the equation?

What is the frictional force? Is it easier to drag a wooden box of books over the carpet or over an ice rink surface?

If the coefficient of friction applies to its downward force, what direction does it act.
 


well, i guess it acts in the downward direction?