PhysicsLAB Worksheet
Test Scenario: 2nd and 3rd Law Forces
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This page is based on a Conceptual Physics Practice Page that dealt with static equilibrium.
 
 
Refer to the following information for the next eight questions.

A uniform plank supports Burt the painter with normal force, N, which acts in a direction opposite to his weight, W.
 
 
 
 
We can say N
 
Since Burt is at rest, the net force on him is
 
The above answer is true because N and W are
 
N is equal and opposite to W. We ___ say that N and W comprise an action-reaction pair.
 
The reason is because action and reaction always
 
and here we see that N and W
 
In accordance with the rule, "If the ACTION is A acting on B, then the REACTION is B acting on A," if we say that the action is the earth pulling down on Burt, then the reaction is
 
To summarize, we see that N and W are equal and opposite to each other
 



 
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