Develop the truth table for each of the combinational logic circuits shown below.
A
B
C
A · B · C
A
B
C
X
a.)
A
B
C
X
b.)
A
B
C
X

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.