In the Figure,a 10-Lb Weight Is Suspended from Two Spring

question 41

Multiple Choice

In the figure,a 10-lb weight is suspended from two spring scales,each of which has negligible weight.Which one of the following statements about the readings in the scales is true?

• A)Each scale will read 5 lb.
• B)The top scale will read zero, the lower scale will read 10 lb.
• C)The lower scale will read zero, the top scale will read 10 lb.
• D)Each scale will show a reading between one and 10 lb, such that the sum of the two is 10 lb. However, exact readings cannot be determined without more information.
• E)None of these is true.

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Definitions:

Biconditional

A logical connective indicating a statement in which two conditions are both necessary and sufficient for each other.

Disjunctions

Logical operators that represent the relationship "or" between two elements, propositions, or sets, implying that at least one of the elements is true.

Negation

In logic, negation refers to the operation of changing a statement's truth value from true to false, or vice versa.

Disjunction

A logical operation that yields true if at least one of its operands is true.