Kinematic Equations
Kinematic Equations represent the motions of a body moving with constant velocity or uniform acceleration. When the body is moving with constant velocity or velocity increases with constant rate, then the body is moving with uniform positive acceleration. At this point, its initial velocity is zero and hence its acceleration is also zero. There is no change in velocity, so body is moving with uniform acceleration. These Kinematic Equations are: V f = v i + at (i) S = V i t + ½ at 2 (ii) V 2 f = V 2 i + 2aS (iii) By utilizing these equations, we can find the values of V f , S, t, a and V i . Example, suppose a car is moving with a velocity of 300 km hr -1 after a distance of .45 km at constant acceleration. Find the acceleration. Here Vi = 0 , Vf = 300 km hr -1 = 300 x 1000/ 1/3600 = 300 / 3.6 = 83.33 ms -1 S = 0.45km = .45 x 1000 = 450m ...