shiyan(十堰)
shiyan(十堰)
Measure 113
Using vernier calipers and spiral micrometer, master the principle and method of measuring length.
114. Study uniform speed and linear motion
The right picture is a paper strip for a dot timer. Setpoint tracking and clear one, began to lay down more dense point, from the place of measurement purposes O A start point, then the interval (every five points) A count points A, B, C, D... It is. The distance between the adjacent counting points is measured, s1, s2, s3... Using a shot tape can:
The instant speed v for any counting point is asked for: for example
(T = 5 * 0.02 s = 0.1 s)
The essay seeks a:
Using the two adjacent displacement in the figure above, a: for example
I use v-t image to solve for a: to find the instantaneous velocity of each point of a, B, C, D, E, and F, and to draw the v-t line of the right, the slope of the graph line is acceleration a.
Note number 1, a count point is taken at intervals of 5 intervals
to facilitate calculation for acceleration.
2. The counting points are guaranteed to have at least two valid digits
115. Inquiry into the relationship between spring and spring elongation (hooker's law) exploratory experiment
Using