Question

In the given arrangement, n number of equal masses are connected by strings of negligible masses. The tension in the string connected to nth mass is –

• A. $\frac { \mathrm { mMg } } { \mathrm { nm } + \mathrm { M } }$
• B. $\frac { \mathrm { mMg } } { \mathrm { nmM } }$
• C. mg
• D. mng

Answer 1

Answer: (A)

$\frac { \mathrm { mMg } } { \mathrm { nm } + \mathrm { M } }$

Answer 2

Acceleration of system a = $\frac { \mathrm { Mg } } { \mathrm { M } + \mathrm { nm } }$

Tension in the last string,

T = ma = $\frac { \mathrm { mMg } } { \mathrm { M } + \mathrm { nm } }$