First slide

Different types of Forces

Question

Two forces are acting on a rope lying on a smooth table as shown in figure.
Which of the following statement (s) is/are correct?
I. In moving from A to B, tension on string decreases from 2F to F.
II. Situation will becomes indeterminant, if we take it a massless string.

Moderate

A

Only I
B

Only II
C

Both I and II
D

None of these

Solution

As forces at two ends of string are different, so tension on it decreases from 2F to F in moving from A to B.
In case of massless string, $a = \frac{2 F - F}{0} = \infty$
Hence, both statements are correct.

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