Question

Three equal weights of mass 2kg each are hanging on a string passing over a fixed pully as shown in figure. What is the tension in the string connecting the weight b and c

Answer 1

Here is your answer.

Please look in the picture.

Answer 2

Answer:

The tension in the string connecting the weight b and c is 13 N.

Explanation:

Given that,

Weight of mass = 2 kg

Suppose the weight keep such as in the figure,

We need to calculate the acceleration

Using formula of acceleration

$a=\dfrac{F}{M}$

Where, F = net force

M = Total mass

$a=\dfrac{(2+2-2)\times g}{2+2+2}$

$a=\dfrac{g}{3}\ m/s^2$

From FBD,

$mg-T=ma$

Put the value of a

$mg-T=\dfrac{mg}{3}$

$T=\dfrac{2mg}{3}$

$T=\dfrac{2\times2\times9.8}{3}$

$T=13\ N$

Hence, The tension in the string connecting the weight b and c is 13 N.