Question

David wants throw a water ballon at george from window. George walks below window every day. With water ballon David estimates george’s Speed to be 0.5m/s. If window is 10m above ground how far in advance should David drop ballon

Answer 1

The time of flight is

$$t=\sqrt{\frac{2h}{g}}=\sqrt{\frac{2(10)}{9.8}}=1.4\ s$$

Thus,

$$d=vt=(0.5)(1.4)=0.7\ m$$