Summary for Maximum Range and the Dominating Component

Q.

Two particles are projected from the ground simultaneously with speeds $20m/s$ and $\frac{20}{\sqrt{3}}m/s$at angles ${30}^{\circ }$ and ${60}^{\circ }$ with the horizontal in the same direction. The maximum distance between them till both of them strike the ground is approximately ($g$ = $10m/s^2$)

1. 23.1 m

2. 16.4 m

3. 30.2 m

4. 10.4 m

Q.

In the motion of a projectile freely under gravity, its

1. Total energy is conserved

2. Momentum is conserved

3. Energy and momentum both are conserved

4. None is conserved