Question

- 18. Calculate the tensions T1, T2 and T3 in the three threads shown in the following figure. (All threads are
massless) (g = 10 m/s2)
137°
T2
4 kg
(1) 30 N, 40 N, 50 N
(3) 35 N, 45 N, 40 N
(2) 50 N, 30 N, 40 N
(4) 30 N, 50 N, 40 N
a​

Answer 1

Answer:

this is the answer.hope it will help you

Answer 2

Answer:

Option A is the right answer.

Explanation:

T1 = T2sin37

$\sin 37=\frac{3}{5}$

There are three tensions acting T1 T2 and T3. We do not consider T3 because this is tension due to gravity and the values 4g

T2 cos37 =4g

$\mathrm{T} 2 \mathrm{x} \frac{4}{5}=40$

Solving the equation we get  

T2 = 50

Putting the value of T2 in in the previous equation T1 = T2sin37

$\mathrm{T} 1=50 \mathrm{x} \frac{3}{5}=30$

And the tension T1 T2 and T3 becomes 30 Newton 40 Newton and 15 Newton respectively