How to find the instantaneous velocity of the first point How to find the instantaneous speed of the first point in a certain period after the learning clock in grade one of senior high school?

How to find the instantaneous velocity of the first point How to find the instantaneous speed of the first point in a certain period after the learning clock in grade one of senior high school?

First, find the velocity of the next point, then you can find it according to the acceleration and time
Let it be point 1, find the velocity of point 2, V2 = s (1 to 3) / 2T, and then V1 + at = v2