Question

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 T′ is [Take $g=10m/s^2$]

• A. 20 N
• B. 40 N
• C. 60 N
• D. 80 N

Answer 1

The correct option is B 40 N

For 6 kg block
T = mg
= 6g
For 2 kg block
T – T′- m′g = 0
T′ = T –m′g
= 6g – 2g
= 4g
= 40 N