The article investigates the contact time of a bouncing drop on a solid surface, a phenomenon studied by Hertz for bouncing balls. The study uses high-speed photography to measure the contact time, which is found to be in the range of 1-10 milliseconds. The contact time is influenced by the drop's radius, impact velocity, and the Weber number, which compares the kinetic and surface energies of the drop. The findings suggest that the contact time is independent of impact velocity over a wide range of velocities but depends on the drop's radius. This research could help quantify the efficiency of water-repellent surfaces and improve water-cooling of hot solids. Additionally, the brief contact time prevents surfactants from adsorbing onto the solid, affecting the dynamic surface tension of the drop.The article investigates the contact time of a bouncing drop on a solid surface, a phenomenon studied by Hertz for bouncing balls. The study uses high-speed photography to measure the contact time, which is found to be in the range of 1-10 milliseconds. The contact time is influenced by the drop's radius, impact velocity, and the Weber number, which compares the kinetic and surface energies of the drop. The findings suggest that the contact time is independent of impact velocity over a wide range of velocities but depends on the drop's radius. This research could help quantify the efficiency of water-repellent surfaces and improve water-cooling of hot solids. Additionally, the brief contact time prevents surfactants from adsorbing onto the solid, affecting the dynamic surface tension of the drop.