The use of the formula of uniform speed change linear motion in senior high school physics compulsory 1 That is, when to use this formula

The use of the formula of uniform speed change linear motion in senior high school physics compulsory 1 That is, when to use this formula

It is suitable for uniform linear motion. That is to say, the resultant force on an object is a constant force (the size and direction are unchanged)
In order to solve the problem of uniform linear motion, first of all, we need to analyze the physical process, the stress of the object, the velocity, acceleration, displacement size and direction of the object, which are known and which are unknown. If there are two or more processes, we also need to find the link between the adjacent processes - the relevant physical quantity, the final velocity of the previous process, It is the initial velocity of the latter process
In addition, we should pay attention to the direction of the vector (the + - sign when substituting into the formula). Generally, the direction of the initial velocity is defined as the positive direction, so as to determine the sign of the velocity, acceleration and displacement
In addition, it is more convenient to calculate displacement or time with average velocity as far as possible