• People have no way to know if something is falling until it’s too late.

• Falling objects, like signs, tools, or tiles, can injure people without warning.

• Typhoons and earthquakes increase the chances of accidents, making people feel unsafe outdoors.

• The warning system alerts people about falling objects in advance, giving them time to avoid danger.

• Fewer accidents happen, meaning fewer injuries and less damage to property.

• People feel safer walking near buildings, especially during storms or after earthquakes.

• There’s a reduced risk of fatalities, making the streets safer for everyone.

• News reports of injuries due to falling objects are less common, showing the system's positive impact.

• Decrease injured and death

• Remind people there are something felling down

• Small, don’t take place (building still look good)

• People feel safer

• A-pillar sensor (for cars)

• More comprehensive safety protection

• Display rack product sensor

• Adding AI to detect where it is bird fly through the sensor or something fell off from building

3rd floor (9 m): 1.36 s
4th floor (12 m): 1.56 s
5th floor (15 m): 1.75 s
10th floor (30 m): 2.47 s
12th floor (36 m): 2.71 s
15th floor (45 m): 3.03 s
23rd floor (69 m): 3.75 s
40th floor (120 m): 4.95 s

(Values rounded to two decimal places, ignoring air resistance.) ​​

time > 0.25s → possible for human to react

Based on the Free Fall Motion Formula v²= 2gh (Assume each floor is 3m high)

𝑣 → the velocity of the object when it hits the ground (m/s).
𝑔 → the acceleration due to gravity, which is 9.8 m/s² on Earth.
ℎ → the height (m).