question_answer

The tension in the string in the pulley system shown in the figure is

A)  75 N                                     

B)  80 N

C)  7.5 N                    

D)         30 N

Correct Answer: A

Solution :

\[10g-T=10a\]                                                    ... (i) \[T-6g=6a\]                                                         ... (ii) From Eqs. (i) and (ii), we get                 \[T=75\,\,N\]