First slide

Connected bodies

Question

A string of length L and mass M is lying on a horizontal table. A force F is applied at one of its ends. Tension in the string at a distance x from the end at which force is applied is:

Easy

A

zero
B

F
C

F(L - x)/L
D

F(L - x)/M

Solution

$\begin{array}{l} Acceleration = \frac{F}{M} \\ Tension, T_{x} = [\frac{M}{L} (L - x)] \frac{F}{M} = \frac{F (L - x)}{L} \end{array}$

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