A body weighing 100 g was thrown vertically upward at a speed of 30 m s. The ptential energy of the body 3s after the throw is equal.
V on h (3) = V0-gt = V0-30 = 0
Consequently, in three seconds the body was at the highest point of its trajectory and had the highest height H.
H = V ^ 2 / 2g = 900/20 = 90/2 = 45m
Ep = m * g * h = 0.1 * 10 * 45 = 45J
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.