The kinematic equations compose 4 equations that are used to hypothesize unknown information regarding the motion of an object if several variables are known. These equations can be used for any motion possessing either:
Given the above, they can never be used over a time period in which acceleration is changing.
Each kinematic equation is composed of 4 variables. In the event that the values of 3 out of the 4 variables are known, then the value of the 4th can be properly calculated.
The kinematic equations are as follows:
d = v_{i}t + 
1
2

at^{2} 
v_{f} ^{2} = v_{i}^{2} + 2ad
v_{f} = v_{i} + at
d = 
v_{i} +
v_{f}
2

t 
d = v_{i}t + 
1
2

at^{2} 
v_{f} ^{2} = v_{i}^{2} + 2ad
v_{f} = v_{i} + at
d = 
v_{i} +
v_{f}
2

t 
Where:
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