A cart loaded with sand moves along a horizontal floor due to constant force F=10 N acting in the direction of the cart's velocity vector. In the process, sand spills through a hole at the bottom at a constant rate, μ=5 kg/s . Find the velocity of the cart at the time t=5 sec, if at the initial moment t=0, the cart loaded with sand has mass m0=100 kg and its velocity was equal to zero. Friction is to be neglected. [Take ln(43)=0.288 and g=10 m/s2]