The application of displacement acceleration time formula is that displacement is not equal to acceleration times the square of time, but the difference of displacement in continuous equal time is equal to acceleration times the square of time. The application is to find the differential method of acceleration, which is generally used in the experiment of dot timer. If it is a four-segment displacement, the sum of the first two segments is subtracted from the sum of the last two segments, and the time square divided by four times is the acceleration.

rate curve

Speed is usually used to indicate the speed at which an object moves. Numerically, speed is equal to the distance traveled per unit time. The calculation formula is that V is equal to Δ x or Δ t, and the common units of speed are meters or seconds, kilometers or hours, where meters or seconds are the basic units in the international system of units. Speed is a vector.

The definition in junior high school physics textbooks is how far an object moves in a unit time. The definition of high school is that speed is equal to the ratio of displacement to the time taken for displacement to occur. According to the definition of college physics, speed is a physical quantity describing the speed and direction of particle motion, which is equal to the differential of displacement with time.