A particle (A) is dropped from a height and another particle (B) is thrown in horizontal direction with speed of 5 m/sec from the same height. The correct statement is

Q. A particle $A$ is dropped from a height and another particle $B$ is projected in horizontal direction with speed of $5m/s$ from the same height, then correct statement is

Q. A particle is projected upwards with some velocity. At what height from ground should another particle be just dropped at the same time so that both reach the ground simultaneously. Assume that first particle reaches to a maximum height $H$.

Q. From the top of a building, a particle is projected up at an angle $\theta$ with horizontal and reaches the ground in time $t_1$. A second particle projected down at an angle $\theta$ with horizontal and with same speed reaches the ground in time $t_2$. If third particle projected horizontally with same speed reaches the ground in time $t_3$, then

Q.

A particle (A) is dropped from a height and another particle (B) is thrown in horizontal direction with speed of 5 m/sec from the same height, bith occuring at the same time. The correct statement is

Q. A particle of mass m is dropped from a height h above the ground. At the same time another particle of the same mass is thrown vertically upwards from the ground with a speed of $\sqrt{2gh}$. If they collide head-on completely inelastically, the time taken for the combined mass to reach the ground, in units of $\sqrt{\frac{h}{g}}$ is