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  • The tension in the elastic string is when all the surfaces are frictionless. If <img alt="2 \mathrm{~kg}" src="https://entran

The tension in the elastic string is T when all the surfaces are frictionless. If 2 \mathrm{~kg} block is glued to the surface, the tension in the string will be - 

Option: 1

Zero


Option: 2

Greater than T 


Option: 3

Less than T


Option: 4

Equal to T


Answers (1)

best_answer

when all surfaces are smooth the two blocks will accelerate. If ' a ' be the acceleration then,
\begin{aligned} & 10 \times 9.8-T=10 a \\ & \text { and }\ T=2 a \\\ & \frac{98-T}{T}=\frac{5}{1} \\\ & 98-T=5 T \\\ & T=\frac{98}{6}=16.33 \mathrm{~N} \end{aligned}                           
Now,\ when\ 2 \mathrm{~kg}\ is\ glued, \\ T=10 \times 9.8=98 \mathrm{~N}
\therefore Tension in string increases when 2 \ kg black is glued.

Posted by

Sanket Gandhi

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