Laws Of Motion Question 12
Question 12 - 2024 (30 Jan Shift 2)
Three blocks A, B and C are pulled on a horizontal smooth surface by a force of $80 N$ as shown in figure
| $m A$ | B | C | |||
|---|---|---|---|---|---|
| $5 kg$ | $T _1$ | $3 kg$ | $I _2$ | $2 kg$ | $=80$ |
The tensions $T _1$ and $T _2$ in the string are respectively:
(1) $40 N, 64 N$
(2) $60 N, 80 N$
(3) $88 N, 96 N$
(4) $80 N, 100 N$
Show Answer
Answer: (1)
Solution:
$a _A=a _B=a _C=\frac{F}{5+3+2}=\frac{80}{10}=8 m / s^{2}$
A
$T _1=5 \times 8=40 \xrightarrow{3} \xrightarrow{T _1} \xrightarrow{T _2}$
$T _2-T _1=3 \times 8 \Rightarrow T _2=64$
