Two particles are projected with the same initial velocity, one makes an angle \(\theta\) with the horizontal while the other makes an angle \(\theta\) with the vertical. If their common range is \(R\), then the product of their time of flight is directly proportional to:
1. \(R\)
2. \(R^2\)${\mathrm{}}^{}$
3. \(\frac{1}{R}\)
4. \(R^{0}\)

If two projectiles, with the same masses and with the same velocities, are thrown at an angle \(60^\circ\) & \(30^\circ\) with the horizontal, then which of the following quantities will remain the same?

A particle is projected, making an angle of $\mathrm{}$\(45^{\circ}\) with the horizontal and having kinetic energy \(K\). The kinetic energy at the highest point will be: 
1. \(\frac{K}{\sqrt{2}}\)
2. \(\frac{K}{2}\)
3. \(2K\)
4. \(K\)

A particle \((A)\) is dropped from a height and another particle \((B)\) is projected in a horizontal direction with a speed of \(5\) m/s from the same height. The correct statement, from the following, is: