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Vx=V0 *[根号(h^2+x^2)]/x = V0 *[(h/x)^2 +1]^(1/2)
ax=dVx/dt = (dx/dt)*(dVx/dx) = Vx *V0 *(1/2)*{[(h/x)^2 +1]^(-1/2)} *2*(h/x)*(-h/x^2)
= Vx *V0*(h^2)*{[(h/x)^2 +1]^(-1/2)} *(1/x^3)
= V0 *{[(h/x)^2 +1]^(1/2)} *V0*(h^2)*{[(h/x)^2 +1]^(-1/2)} *(1/x^3)
= (V0^2)*(h^2)/x^3
ax=dVx/dt = (dx/dt)*(dVx/dx) = Vx *V0 *(1/2)*{[(h/x)^2 +1]^(-1/2)} *2*(h/x)*(-h/x^2)
= Vx *V0*(h^2)*{[(h/x)^2 +1]^(-1/2)} *(1/x^3)
= V0 *{[(h/x)^2 +1]^(1/2)} *V0*(h^2)*{[(h/x)^2 +1]^(-1/2)} *(1/x^3)
= (V0^2)*(h^2)/x^3
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