| Consider two spring balances hooked as shown in the figure below. We pull them in opposite directions. If the reading shown by A is 1.5 N, then reading shown by B will be |
 |
A) 1.5 N
B) 2.5 N
C) 3.0 N
D) zero
Correct Answer: A
Solution :
[a] According to Newton's third law, every action has equal and opposite reaction. Hence, force (action) exerted by A on B and force exerted by B on A (reaction) are equal and reading shown by B will be 1.5 N.
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