Question

1. A uniform rod AB of weight 100N and length 2m supported by two vertical strings at its ends and carries a load of 20kgf as shown in the figure. Find the tension in strings​

Answer 1

(The diagram  in the question is attached below in the answer tab)

Given :

Weight of the rod AB= 100N

Length of the rod AB= 2m

Load acting on the rod = 20 kgf

To Find :

The tension in the strings attached to the rod

Solution :

• Let us Assume Tension in the string at A = T₁

                                 Tension in the string at B = T₂

• By considering moments at point A

           $100\times1+(200 \times0.5)=T_{2} \times2$

           $2T_{2} =200$

           $T_{2} =100N$

• The net force on the rod should be zero
• Sum of upward forces = Sum of downward forces

           $T_{1} +T_{2} =200+100$

           $T_{1} +T_{2} =300$

           $T_{1} =200N$            

The tension in the strings are 200N &  100N respectively .