Question

In the figure given below a weight of 20 kg is suspended at one end of cord and a weight of 30 kg is suspended at other end of cord passing over a pulley. Neglecting the weight of rope and pulley, tension in cord will be:

• A. 30 N
• B. 20 N
• C. 10 N
• D. None of these

Answer 1

Answer:

D. None of these

From Newton's Second Law of motion

$30\times g - T =30\times a \Rightarrow T=30\times g-30\times a$......(1)

$T-20\times g=20\times a \Rightarrow T = 20\times g + 20\times a$ .......(2)

T = 235.44 N