What are the weight and normal force of a stationary car on a sloped road?

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A stationary car on a 30-degree sloped road has a weight W and a frictional force of 4000 N acting up the slope. To determine the weight W and the normal force R, a vector diagram is essential, with the frictional force correctly positioned. The frictional force should be represented pointing up the slope, while the weight acts vertically downward. Understanding the components of these forces is crucial for solving the problem. Properly drawing the diagram will help clarify the relationships between the forces involved.
whkoh
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A stationary car of weight W on a road sloping at 30 degrees to the horizontal. The frictional force on the car is 4000 N acting up the road BC.

http://img156.exs.cx/img156/5915/phy6dj.png

What is
(a) the weight W
(b) the normal contact force R of the road surface on the car?
 
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What exactly are you stuck on? You're going to need to show evidence of having done stuff, as people aren't going to do your homework for you!
 
Well...the first part. I can't get the vector diagram right. Where do I put 4000 N to start with?
 
Draw your picture with the road sloping down to the right, say. Then the frictional force points back up the road, up and to the left.
 
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