Question

11. Two blocks of mass 2 kg and 6 kg are attached to
the ends of a string passing over a pulley. The
2 kg mass is attached to the table top by another
string. The tension in this string T¹ is
[Take g = 10 m/s?]
(1) 20 N
(3) 60 N
(2) 40 N
(4) 80 N​

Answer 1

EXPLANATION.

• GIVEN

Two blocks of mass 2 kg and 6 kg attached to

the ends of a string passes over a pulley.

The 2kg mass is attached to the table top by

another string.

To find tension T¹ is.

According to the question,

F. B. D of block 6 kg

=> 6g - T = 6a

one string is fixed so acceleration = 0

=> T = 6g ......(1)

F. B. D of block 2 kg

=> T - 2g + T1 = 0 ..... (2)

From equation (1) and (2) we get,

put the value of equation (1) in equation (2)

=> 6g - 2g + T1 = 0

=> 4g + T1 = 0

=> T1 = 40 N

Therefore,

=> T1 = 40N