Two blocks of masses 2 kg and 4 kg are attached by an inextensible light string as shown in the figure. If a force of 120 N pulls the blocks vertically upward, the tension in the string is (take g = 10 ms-2)

Question

Two blocks of masses 2 kg and 4 kg are attached by an inextensible light string as shown in the figure. If a force of 120 N pulls the blocks vertically upward, the tension in the string is (take g = 10 ms-2) (A) 20 N (B) 15 N (C) 35 N (D) 40 N

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/1c91892b72a7fcf51b4a29630953e641-.png" /> F=m a 120 =(4+2) × a a =(120/6)=20 m / s 2 The tension in the string T =F=m a =2 × 20=40 N

Q. Two blocks of masses $2 k g$ and $4 k g$ are attached by an inextensible light string as shown in the figure. If a force of $120 N$ pulls the blocks vertically upward, the tension in the string is
(take $g = 10 m s^{- 2}$ )

20 N

15 N

35 N

40 N

30 N

$F = ma$
$120 = (4 + 2) \times a$
$a = \frac{120}{6} = 20 m / s^{2}$
The tension in the string
$T = F = ma$
$= 2 \times 20 = 40 N$

Q. Two blocks of masses 2kg and 4kg are attached by an inextensible light string as shown in the figure. If a force of 120N pulls the blocks vertically upward, the tension in the string is (take g=10ms−2)