Question 41: Laws of Motion

Question

A system to 10 balls each of mass 2 kg are connected via massless and unstretchable string. The system is allowed to slip over the edge of a smooth table as shown in figure. Tension on the string between the 7
th
and 8
th
ball is __________ N when 6
th
ball just leaves the table.
![](https://app-content.cdn.examgoal.net/fly/@width/image/1l5ahm8q7/5be70005-7e4b-4386-a360-26f8d344be3a/6f15d3f0-fda7-11ec-9895-953d7c4166fb/file-1l5ahm8q8.png?format=png)

Accepted Answer

At given instant
${a_{sys}} = {{6\,m 	imes g} \over {10\,m}} = {{6\,g} \over {10}}$
$	herefore$ ${T_{78}} = (3m) 	imes {a_{sys}}$
$ = (3m) 	imes \left( {{{6g} \over {10}}} ight)$
$ = {{3 	imes 2 	imes 6 	imes 10} \over {10}} = 36\,N$

Laws of Motion

A system to 10 balls each of mass 2 kg are connected via massless and unstretchable string. The system is allowed to slip over the edge of a smooth table as shown in figure. Tension on the string between the 7 th and 8 th ball is __________ N when 6 th ball just leaves the table.

Integer / Numeric Answer Type