F(t) dh xdt or F(dt +F()dt (5-19) whereVox is initial velocity, v is the velocity at time t. In the same way with V dt we have x()=x04+|vn()dh (5-20 If F is a constant, Egs. 19 and 20 will reduce to the formula we obtained for const, acceleration motionx v0 dt m F t dv t x v v x x x   = 0 ( ) 0  = + t x x F t dt m v t v 0 0 ( ) 1 ( )  − = t x x F(t)dt m v v 0 0 1 x v (5-19) where is initial velocity, is the velocity at time t. If is a constant, Eqs. 19 and 20 will reduce to the formula we obtained for const. acceleration motion. Fx  = + t x t x vx t dt 0 0 ( ) ( ) (5-20) In the same way with , we have dt dx vx = or