Tension Forces
1. **Problem Statement:** We have a force diagram with two tension forces $T_A$ and $T_B$ each making a 60° angle with the vertical weight force $W$. We want to find the tensions $T_A$ and $T_B$ given the weight $W=294$ N.
2. **Horizontal Force Equilibrium:** The sum of horizontal forces must be zero:
$$-T_A \cos 60^\circ + T_B \cos 60^\circ = 0$$
This implies:
$$T_A \cos 60^\circ = T_B \cos 60^\circ$$
Since $\cos 60^\circ$ is the same for both, it follows that:
$$T_A = T_B$$
3. **Vertical Force Equilibrium:** The sum of vertical forces must balance the weight:
$$T_A \sin 60^\circ + T_B \sin 60^\circ = W$$
Using $T_A = T_B$, this becomes:
$$2 T_A \sin 60^\circ = 294$$
4. **Solving for $T_A$:**
$$T_A = \frac{294}{2 \sin 60^\circ}$$
Recall $\sin 60^\circ = \frac{\sqrt{3}}{2} \approx 0.866$:
$$T_A = \frac{294}{2 \times 0.866} = \frac{294}{1.732} \approx 169.74$$
5. **Conclusion:** Both tensions are equal:
$$T_A = T_B \approx 169.74 \text{ N}$$
This means each tension force supports half the vertical component needed to balance the weight, considering the 60° angle.