Thief A is in an apartment 10m high and is throwing a bag of valuables horizontally at 5 m/s. Thief B is initially standing right below the point of release. Find the velocity with which he should run to catch the bag in time.
at 5 m/s
The horizontal motion of the bag is independent of its vertical motion. Hence, to cath the bag he should run with the same speed as that of horizontal speed of bag.