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The string on the left in Fig. suddenly snaps. At the instant when the string snaps, the magnitude of the net force on the object is

The string on the left in Fig. suddenly snaps. At the instant when the string snaps, the magnitude of the net force on the object is

Grade:11

1 Answers

Aditi Chauhan
askIITians Faculty 396 Points
6 years ago
The correct option is: (C) 13.9 N.
Below you see the free body diagram of the object, at the instant when the string on the left breaks. It is assumed in the figure that the tension in the string is represented by F and the weight of the object by W.
236-1779_15.PNG
The net force acting on the object in the horizontal direction is:

236-2047_16.PNG
Therefore the net force in the horizontal direction is 9.8 N.
Similarly, the net force acting the vertical direction is:
236-1443_17.PNG
Therefore, the net force in the vertical direction is 9.8 N.
The magnitude of net force on the object is:
236-125_18.PNG
Therefore, the net force on the object is 13.9 N, and (C) is the correct option.

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