PhysicsLAB CP Workbook
Equilibrium on an Inclined Plane
Refer to the following information for the next question.

The block is at rest on a horizontal surface. The normal support force n is equal and opposite to weight W.
There is ____ because the block has no tendency to slide.
 
Refer to the following information for the next four questions.

At rest on the incline, friction acts. Note in the diagram to the right that the resultant f + n, shown by the dashed vector, is equal and opposite to W.
Here we see that the size of n is ____ the size of W.
 
You draw the resultant f + n for the block at rest on the steeper incline.
 
 

The resultant magnitude of f + n is ____ the magnitude of W.
 
As the angle of the incline increases, the magnitude of vector n
 
The block remains at rest on the still steeper incline.
You draw in the vectors for equilibrium. 

How does the resultant f + n compare to W? 

Refer to the following information for the next four questions.

Suppose the angle is increased and the block slides down the incline at constant velocity.
Then the net force on the block is
 
If the angle is increased even further, then acceleration
 
Further steepness of the incline means ____ acceleration down the plane.
 
When the incline is vertical, acceleration is
 



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