上海高中物理公式（Shanghai high school physics formula）.doc

上海高中物理公式（Shanghai high school physics formula） conclusion The motion of the particle (1) - - - linear motion 1) uniform speed linear motion 1. The average velocity V - = S/t (definition) 2. Useful inference n ^ 2 - Vo as ^ 2 = 2 Speed Vt / 2 = V square = (Vt + Vo) / 2 5. The middle speed V / 2 = [(Vo ^ 2 + n ^ 2) / 2] 1/2 6. Displacement flat t = S = V Vot + the at ^ t 2/2 = n / 2 7. Acceleration a = (Vt - Vo)/t is in the positive direction of Vo, and a has the same direction as Vo (acceleration) a BBB 0 0; Opposite to a 0 8. Experimental inference Δ S = the aT ^ 2 Δ S equal to adjacent continuous time (T) is the difference between the displacement Main physical quantities and units: first speed (Vo) : m/s Acceleration: (a) m/s ^ 2 speed (Vt) : at the end of the m/s Time (t) : seconds (s) displacement (s) : meter (m) distance: meter speed unit conversion: 1m/s = 3.6 Km/h Note: (1) the average velocity is a vector. (2) the object is fast and the acceleration is not large. (3) a = (Vt - Vo)/t is just a measurement, not a determination. (4) other relevant content: particle/displacement and distance/s - t graph/v - t diagram/speed and rate / 2) free fall 1. Initial velocity Vo = 0 2. Final velocity Vt = gt 3. The drop height h = gt ^ 2/2 (down from the Vo position) 4. The inference n ^ 2 = 2 gh Note: (1) free fall movement is a uniformly accelerated linear motion with zero initial velocity and linear motion of uniform velocity. (2) a = g = 9.8 m/s ^ 2 material 10 m/s ^ 2 smaller acceleration of gravity near the equator, in the mountain area is smaller than the ground, the direction of the vertical downward. 3) throw it vertically 1. The displacement S = Vot - gt ^ 2 2/2 speed at the end of the n = Vo - gt (g = 9.8 material 10 m/s2) 3. Useful inference n ^ 2 - Vo ^ 2 = 4-2 gs up maximum height Hm = Vo ^ 2/2 g (point) count 5. Round-trip time t = 2Vo/g (from the time it was thrown back to its original position) Note: (1) the whole process: the uniform deceleration linea