A ball of momentum $p$ hits a horizontal surface at an angle $\theta$ to the surface, as illustrated. It leaves the surface again with the same momentum magnitude, making an angle $\theta$ to the surface. The duration of contact between the ball and the surface is time $t$. What is the magnitude of the average resultant force acting on the ball during the collision?
- Azero
- B$\frac{2p}{t}$
- C$\frac{2p\cos\theta}{t}$
- D$\frac{2p\sin\theta}{t}$