L=√h？ +x？

v0=dL/dt=(dL/dx)(dx/dt)=xv/√h？ +x？

So ship speed: v=(√h? +x？ )v0/x

The acceleration is obtained by taking the derivative of velocity v versus time t.

a=dv/dt=(dv/dx)(dx/dt)=-(h？ v0√h？ +x？ )/x？