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A spring balance is attached on both ends to strings; the strings hang over frictionless pulleys and are each connected to 20 N weights as shown in Fig. The reading on the scale will be closest to (A) 0 N (B) 10 N (C) 20 N (D) 40 N

A spring balance is attached on both ends to strings; the strings hang over frictionless pulleys and are each connected to 20 N weights as shown in Fig. The reading on the scale will be closest to
(A) 0 N                
(B) 10 N             
(C) 20 N              
(D) 40 N

Grade:upto college level

2 Answers

venu
36 Points
7 years ago
B,because the attached  weights are equal,so there will be no strecthing  of string
Saurabh Kumar
askIITians Faculty 2406 Points
7 years ago
Although the diagram is not given, the net extension produced in the system is the force due to weight hung.....

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