An equilibrium diagram shows a ball of weight $W$ suspended from a string. The string makes an angle $\theta$ with the vertical. The tension in the string is $T$. A metal rod exerts a horizontal force $P$ on the ball, keeping it away from the wall. Which relation between the magnitudes of $T$, $P$ and $W$ is correct?
- A$P = T\cos\theta$ and $W = T\sin\theta$
- B$T = P + W$
- C$T^2 = P^2 + W^2$
- D$W = P\tan\theta$ and $W = T\cos\theta$