The formula from top to bottom in the second day of physics, such as: pressure formula P = f △ s (P is pressure) (F is pressure) (s is force) The top-down formula of the second day of physics, such as: pressure formula P = f △ s (P is pressure) (F is pressure) (s is the contact area of the stressed object)

The formula from top to bottom in the second day of physics, such as: pressure formula P = f △ s (P is pressure) (F is pressure) (s is force) The top-down formula of the second day of physics, such as: pressure formula P = f △ s (P is pressure) (F is pressure) (s is the contact area of the stressed object)

Velocity formula: v = s / T (V is velocity, s is distance, t is time) density formula ρ = m / V (ρ is density, M is mass, V is volume) gravity formula g = g / M (G is ratio, G is gravity, M is mass) pressure formula p = f / S (P is pressure, f is force, s is stressed area) Archimedes principle